diff --git a/apis/phabricator.py b/apis/phabricator.py
index a12e42d4..18436a3f 100644
--- a/apis/phabricator.py
+++ b/apis/phabricator.py
@@ -71,17 +71,17 @@ def submit_to_phabricator(rev_id, retry_attempt=None):
 
         # arc diff will squash all commits into a single commit, so we need to jump through some hoops.
         # Conceptually, we are only commiting the top-most commit in the repo (and not any subsequent commits)
-        # If we have two commits, we'll go backwards and grab only the first commit, then go back to tip
+        # If we have two commits, we'll go backwards and grab only the first commit, then go back to HEAD
         if has_patches:
             # Checkout to the first patch
-            self.run(["hg", "checkout", "tip^"])
+            self.run(["git", "checkout", "HEAD~1"])
             # Tell phabricator to submit from the base to the current working tree
             phab_revisions.append(submit_to_phabricator(""))
-            # Ask hg to evolve the original second patch on top of the rewritten first patch
-            self.run(["hg", "next"])
+            # Return to the original branch tip
+            self.run(["git", "checkout", "-"])
 
         # Submit only a single patch
-        phab_revisions.append(submit_to_phabricator("tip^"))
+        phab_revisions.append(submit_to_phabricator("HEAD~1"))
 
         # Chain revisions together if needed
         @retry
diff --git a/automation.py b/automation.py
index 6f736c73..9dff64a7 100755
--- a/automation.py
+++ b/automation.py
@@ -5,7 +5,6 @@
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 import os
-import re
 import sys
 import time
 from components.logging import LoggingProvider, SimpleLogger, LogLevel
@@ -15,7 +14,7 @@
 from components.mach_vendor import VendorProvider
 from components.bugzilla import BugzillaProvider
 from components.scmprovider import SCMProvider
-from components.hg import MercurialProvider, reset_repository
+from components.git import GitProvider, reset_repository
 from apis.taskcluster import TaskclusterProvider
 from apis.phabricator import PhabricatorProvider
 from tasktypes.vendoring import VendorTaskRunner
@@ -28,7 +27,7 @@
     'Vendor': VendorProvider,
     'Bugzilla': BugzillaProvider,
     'Library': LibraryProvider,
-    'Mercurial': MercurialProvider,
+    'Git': GitProvider,
     'Taskcluster': TaskclusterProvider,
     'Phabricator': PhabricatorProvider,
     'SCM': SCMProvider,
@@ -119,7 +118,7 @@ def getOr(name):
                 'vendorProvider': getOr('Vendor'),
                 'bugzillaProvider': getOr('Bugzilla'),
                 'libraryProvider': getOr('Library'),
-                'mercurialProvider': getOr('Mercurial'),
+                'gitProvider': getOr('Git'),
                 'taskclusterProvider': getOr('Taskcluster'),
                 'phabricatorProvider': getOr('Phabricator'),
                 'scmProvider': getOr('SCM'),
@@ -180,20 +179,6 @@ def _validate(self, config_dictionary):
                 sys.exit(1)
             config_dictionary['General']['ff-version'] = ff_version
 
-        if 'GECKO_HEAD_REPOSITORY' not in os.environ and 'repo' not in config_dictionary['General']:
-            self.logger.log("I cannot tell what repository I'm running from. Add 'repo' to the config dictionary or ensure GECKO_HEAD_REPOSITORY is in the environment.", level=LogLevel.Fatal)
-            sys.exit(1)
-        elif 'GECKO_HEAD_REPOSITORY' in os.environ:
-            config_dictionary['General']['repo'] = os.environ['GECKO_HEAD_REPOSITORY']
-
-        if re.match(r"https://hg.mozilla.org/projects/(\w+)", config_dictionary['General']['repo']):
-            config_dictionary['General']['repo'] = config_dictionary['General']['repo'].replace("https://hg.mozilla.org/projects/", "")
-        elif re.match(r"https://hg.mozilla.org/mozilla-(\w+)", config_dictionary['General']['repo']):
-            config_dictionary['General']['repo'] = config_dictionary['General']['repo'].replace("https://hg.mozilla.org/", "")
-        else:
-            self.logger.log("The repository specified in the config dictionary was not of the form https://hg.mozilla.org/mozilla-foo.", level=LogLevel.Fatal)
-            sys.exit(1)
-
         return config_dictionary
 
     def run(self, library_filter=""):
diff --git a/components/hg.py b/components/git.py
similarity index 58%
rename from components/hg.py
rename to components/git.py
index e45ab769..8bb2bfe2 100644
--- a/components/hg.py
+++ b/components/git.py
@@ -9,40 +9,38 @@
 
 
 def reset_repository(cmdrunner):
-    cmdrunner.run(["hg", "checkout", "-C", "."])
-    cmdrunner.run(["hg", "purge", "."])
+    head = os.environ.get("GECKO_HEAD_REV", "origin/master")
 
-    original_revision = os.environ.get("GECKO_HEAD_REV", "")
-    if original_revision:
-        ret = cmdrunner.run(["hg", "update", original_revision])
-    else:
-        ret = cmdrunner.run(["hg", "strip", "roots(outgoing())", "--no-backup"], clean_return=False)
-        if ret.returncode == 255:
-            if "abort: empty revision set" not in ret.stderr.decode():
-                ret.check_returncode()
+    # Clean staging area and reset HEAD
+    cmdrunner.run(["git", "reset", "--hard", head])
+    # Clean untracked filed
+    cmdrunner.run(["git", "clean", "-fdx"])
 
 
-class MercurialProvider(BaseProvider, INeedsCommandProvider, INeedsLoggingProvider):
+class GitProvider(BaseProvider, INeedsCommandProvider, INeedsLoggingProvider):
     def __init__(self, config):
         pass
 
     @logEntryExit
     def commit(self, library, bug_id, new_release_version):
+        self.run(["git", "add", "-all"])
         # Note that this commit message format changes, one must also edit the
         # Updatebot Verify job in mozilla-central ( verify-updatebot.py )
         bug_id = "Bug {0}".format(bug_id)
-        self.run(["hg", "commit", "-m", "%s - Update %s to %s" %
+        self.run(["git", "commit", "-m", "%s - Update %s to %s" %
                   (bug_id, library.name, new_release_version)])
 
     @logEntryExit
     def commit_patches(self, library, bug_id, new_release_version):
+        self.run(["git", "add", "-all"])
         # Note that this commit message format changes, one must also edit the
         # Updatebot Verify job in mozilla-central ( verify-updatebot.py )
         bug_id = "Bug {0}".format(bug_id)
-        self.run(["hg", "commit", "-m", "%s - Apply mozilla patches for %s" %
+        self.run(["git", "commit", "-m", "%s - Apply mozilla patches for %s" %
                   (bug_id, library.name)])
 
     @logEntryExit
     def diff_stats(self):
-        ret = self.run(["hg", "diff", "--stat"])
-        return ret.stdout.decode().rstrip()
+        ret = self.run(["git", "diff", "--stat"])
+        out = ret.stdout.decode()
+        return out.rstrip() if out else ""
diff --git a/docs/new_job.md b/docs/new_job.md
index b5b6e833..baa0ee9d 100644
--- a/docs/new_job.md
+++ b/docs/new_job.md
@@ -44,7 +44,7 @@ graph TD
 
     CommentMozBuild[Comment on<br />the bug about error] --> Commit
 
-    Commit[Mercurial Commit] -->HasPatches
+    Commit[Git Commit] -->HasPatches
 
     HasPatches{Are there <br />patches to <br />apply?}
     HasPatches --> |Yes| ApplyPatches[Apply Patches] --> CommitPatches[Commit Patches] --> PushToTry
diff --git a/localconfig.py.example b/localconfig.py.example
index f8f5b4ba..1bbadccc 100644
--- a/localconfig.py.example
+++ b/localconfig.py.example
@@ -3,8 +3,7 @@
 localconfig = {
     'General': {
         'env': 'dev',
-        'gecko-path': '/path/to/mozilla-central',
-        'repo': 'https://hg.mozilla.org/mozilla-central'
+        'gecko-path': '/path/to/firefox',
     },
     'Logging': {
         'level': 5,
diff --git a/tasktypes/vendoring.py b/tasktypes/vendoring.py
index 132845d9..84815202 100644
--- a/tasktypes/vendoring.py
+++ b/tasktypes/vendoring.py
@@ -14,7 +14,7 @@
 from components.mach_vendor import VendorResult
 from components.dbmodels import JOBSTATUS, JOBOUTCOME, JOBTYPE
 from components.logging import LogLevel, logEntryExit, logEntryExitNoArgs
-from components.hg import reset_repository
+from components.git import reset_repository
 
 
 class VendorTaskRunner(BaseTaskRunner):
@@ -87,7 +87,7 @@ def _reset_for_new_job(self):
         self.logger.log("Removing any outgoing commits before moving on.", level=LogLevel.Info)
 
         # If we are on TC, update to the HEAD commit to avoid stripping WIP commits on holly
-        self.cmdProvider.run(["hg", "status"])
+        self.cmdProvider.run(["git", "status"])
         reset_repository(self.cmdProvider)
 
     # ====================================================================
@@ -137,7 +137,7 @@ def _process_new_job(self, library, task, new_version, timestamp, most_recent_jo
 
         # File the bug ------------------------
         all_upstream_commits, unseen_upstream_commits = self.scmProvider.check_for_update(library, task, new_version, most_recent_job.version if most_recent_job else None)
-        commit_stats = self.mercurialProvider.diff_stats()
+        commit_stats = self.gitProvider.diff_stats()
         commit_details = self.scmProvider.build_bug_description(all_upstream_commits, 65534 - len(commit_stats) - 220) if library.should_show_commit_details else ""
 
         created_job.bugzilla_id = self.bugzillaProvider.file_bug(library, CommentTemplates.UPDATE_SUMMARY(library, new_version, timestamp), CommentTemplates.UPDATE_DETAILS(len(all_upstream_commits), len(unseen_upstream_commits), commit_stats, commit_details), task.cc, blocks=task.blocking)
@@ -166,7 +166,7 @@ def _process_new_job(self, library, task, new_version, timestamp, most_recent_jo
 
         # Commit ------------------------------
         try:
-            self.mercurialProvider.commit(library, created_job.bugzilla_id, new_version)
+            self.gitProvider.commit(library, created_job.bugzilla_id, new_version)
         except Exception as e:
             self.dbProvider.update_job_status(created_job, JOBSTATUS.DONE, JOBOUTCOME.COULD_NOT_COMMIT)
             self.bugzillaProvider.comment_on_bug(created_job.bugzilla_id, CommentTemplates.COULD_NOT_GENERAL_ERROR("commit the updated library."), needinfo=library.maintainer_bz)
@@ -187,7 +187,7 @@ def _process_new_job(self, library, task, new_version, timestamp, most_recent_jo
                 return
             # Commit Patches ------------------
             try:
-                self.mercurialProvider.commit_patches(library, created_job.bugzilla_id, new_version)
+                self.gitProvider.commit_patches(library, created_job.bugzilla_id, new_version)
             except Exception as e:
                 self.dbProvider.update_job_status(created_job, JOBSTATUS.DONE, JOBOUTCOME.COULD_NOT_COMMIT_PATCHES)
                 self.bugzillaProvider.comment_on_bug(created_job.bugzilla_id, CommentTemplates.COULD_NOT_GENERAL_ERROR("commit after applying mozilla patches."), needinfo=library.maintainer_bz)
@@ -500,7 +500,7 @@ def _process_job_details_for_awaiting_initial_platform_results(self, library, ta
 
         # Re-Commit -------------------
         try:
-            self.mercurialProvider.commit(library, existing_job.bugzilla_id, existing_job.version)
+            self.gitProvider.commit(library, existing_job.bugzilla_id, existing_job.version)
         except Exception as e:
             self.dbProvider.update_job_status(existing_job, JOBSTATUS.DONE, JOBOUTCOME.COULD_NOT_COMMIT)
             self.bugzillaProvider.comment_on_bug(existing_job.bugzilla_id, CommentTemplates.COULD_NOT_GENERAL_ERROR("commit the updated library."), needinfo=library.maintainer_bz)
@@ -521,7 +521,7 @@ def _process_job_details_for_awaiting_initial_platform_results(self, library, ta
                 return
             # Commit Patches ------------------
             try:
-                self.mercurialProvider.commit_patches(library, existing_job.bugzilla_id, existing_job.version)
+                self.gitProvider.commit_patches(library, existing_job.bugzilla_id, existing_job.version)
             except Exception as e:
                 self.dbProvider.update_job_status(existing_job, JOBSTATUS.DONE, JOBOUTCOME.COULD_NOT_COMMIT_PATCHES)
                 self.bugzillaProvider.comment_on_bug(existing_job.bugzilla_id, CommentTemplates.COULD_NOT_GENERAL_ERROR("commit after applying mozilla patches."), needinfo=library.maintainer_bz)
diff --git a/tests/automation_configuration.py b/tests/automation_configuration.py
index 677a02eb..bd91eb92 100755
--- a/tests/automation_configuration.py
+++ b/tests/automation_configuration.py
@@ -49,10 +49,10 @@ def _update_config(self, config):
         self.also_expected = "Made it!"
 
 
-class TestConfigMercurialProvider(BaseTestConfigProvider):
+class TestConfigGitProvider(BaseTestConfigProvider):
     def __init__(self, config):
-        self.expected = 'mercurial!'
-        super(TestConfigMercurialProvider, self).__init__(config)
+        self.expected = 'git!'
+        super(TestConfigGitProvider, self).__init__(config)
 
     def _update_config(self, config):
         self.also_expected = "Made it!"
@@ -122,12 +122,11 @@ def testConfigurationPassing(self):
                 'env': 'dev',
                 'gecko-path': 'nowhere',
                 'ff-version': 87,
-                'repo': 'https://hg.mozilla.org/mozilla-central'
             },
             'Database': {'specialkey': 'database!'},
             'Vendor': {'specialkey': 'vendor!'},
             'Bugzilla': {'specialkey': 'bugzilla!'},
-            'Mercurial': {'specialkey': 'mercurial!'},
+            'Git': {'specialkey': 'git!'},
             'Taskcluster': {'specialkey': 'taskcluster!'},
             'Phabricator': {'specialkey': 'phab!'},
             'Command': {'specialkey': 'command!'},
@@ -139,7 +138,7 @@ def testConfigurationPassing(self):
             'Database': TestConfigDatabaseProvider,
             'Vendor': TestConfigVendorProvider,
             'Bugzilla': TestConfigBugzillaProvider,
-            'Mercurial': TestConfigMercurialProvider,
+            'Git': TestConfigGitProvider,
             'Taskcluster': TestConfigTaskclusterProvider,
             'Phabricator': TestConfigPhabricatorProvider,
             'Logging': TestConfigLoggingProvider,
diff --git a/tests/bugzilla.py b/tests/bugzilla.py
index d4f74f0f..49beb358 100755
--- a/tests/bugzilla.py
+++ b/tests/bugzilla.py
@@ -159,7 +159,6 @@ def setUpClass(cls):
             'General': {
                 'env': 'dev',
                 'ff-version': 88,
-                'repo': 'https://hg.mozilla.org/mozilla-central'
             },
             'apikey': 'bob',
             'url': 'http://localhost:27489/',
diff --git a/tests/functionality_all_platforms.py b/tests/functionality_all_platforms.py
index 82d33513..89f3ed93 100755
--- a/tests/functionality_all_platforms.py
+++ b/tests/functionality_all_platforms.py
@@ -27,7 +27,7 @@
 from components.dbc import DatabaseProvider
 from components.dbmodels import JOBSTATUS, JOBOUTCOME
 from components.mach_vendor import VendorProvider
-from components.hg import MercurialProvider
+from components.git import GitProvider
 from components.scmprovider import SCMProvider
 from apis.taskcluster import TaskclusterProvider
 from apis.phabricator import PhabricatorProvider
@@ -79,7 +79,7 @@ def COMMAND_MAPPINGS(expected_values, command_callbacks):
     # bugzilla server which provides no additional logic coverage
     'Bugzilla': MockedBugzillaProvider,
     # Not Mocked At All
-    'Mercurial': MercurialProvider,
+    'Git': GitProvider,
     # Not Mocked At All, but does point to a fake server
     'Taskcluster': TaskclusterProvider,
     # Not Mocked At All
@@ -113,7 +113,6 @@ def _setup(self,
                 'env': 'dev',
                 'gecko-path': '.',
                 'ff-version': 87,
-                'repo': 'https://hg.mozilla.org/mozilla-central'
             },
             'Command': {'test_mappings': None},
             'Logging': localconfig['Logging'],
@@ -126,7 +125,7 @@ def _setup(self,
                 'assert_assignee_func': assert_assignee_func,
                 'assert_prior_bug_reference': assert_prior_bug_reference
             },
-            'Mercurial': {},
+            'Git': {},
             'Taskcluster': {
                 'url_treeherder': 'http://localhost:27490/',
                 'url_taskcluster': 'http://localhost:27490/',
@@ -1680,7 +1679,6 @@ def abandon_callback(cmd):
             config_dictionary = copy.deepcopy(u.config_dictionary)
             config_dictionary['Database']['keep_tmp_db'] = False
             config_dictionary['General']['ff-version'] += 1
-            config_dictionary['General']['repo'] = "https://hg.mozilla.org/mozilla-beta"
 
             u = Updatebot(config_dictionary, PROVIDERS)
 
diff --git a/tests/functionality_commitalert.py b/tests/functionality_commitalert.py
index 79504b60..4b7bed22 100755
--- a/tests/functionality_commitalert.py
+++ b/tests/functionality_commitalert.py
@@ -128,7 +128,7 @@ def bug_has_landing_link(self, bug_id):
     'Library': MockLibraryProvider,
     # Not mocked
     'SCM': SCMProvider,
-    'Mercurial': NeverUseMeClass,
+    'Git': NeverUseMeClass,
     'Taskcluster': NeverUseMeClass,
     'Vendor': NeverUseMeClass,
     'Phabricator': NeverUseMeClass,
@@ -159,7 +159,6 @@ def _setup(current_library_version_func,
                 'env': 'dev',
                 'gecko-path': '.',
                 'ff-version': 87,
-                'repo': 'https://hg.mozilla.org/mozilla-central'
             },
             'Command': {
                 'test_mappings': None,
@@ -174,7 +173,7 @@ def _setup(current_library_version_func,
                 'filed_bug_ids_func': filed_bug_ids_func,
                 'assert_affected_func': assert_affected_func
             },
-            'Mercurial': {},
+            'Git': {},
             'Taskcluster': {},
             'Phabricator': {},
             'Library': {
@@ -606,7 +605,6 @@ def assert_affected(bug_id, ff_version, affected):
         config_dictionary = copy.deepcopy(u.config_dictionary)
         config_dictionary['Database']['keep_tmp_db'] = False
         config_dictionary['General']['ff-version'] += 1
-        config_dictionary['General']['repo'] = "https://hg.mozilla.org/mozilla-beta"
 
         call_counter += 1
 
@@ -710,7 +708,6 @@ def assert_affected(bug_id, ff_version, affected):
         config_dictionary = copy.deepcopy(u.config_dictionary)
         config_dictionary['Database']['keep_tmp_db'] = False
         config_dictionary['General']['ff-version'] += 1
-        config_dictionary['General']['repo'] = "https://hg.mozilla.org/mozilla-beta"
 
         call_counter += 1
 
@@ -813,7 +810,6 @@ def assert_affected(bug_id, ff_version, affected):
         config_dictionary = copy.deepcopy(u.config_dictionary)
         config_dictionary['Database']['keep_tmp_db'] = False
         config_dictionary['General']['ff-version'] += 1
-        config_dictionary['General']['repo'] = "https://hg.mozilla.org/mozilla-beta"
 
         call_counter += 1
 
@@ -880,7 +876,6 @@ def assert_affected(bug_id, ff_version, affected):
         config_dictionary = copy.deepcopy(u.config_dictionary)
         config_dictionary['Database']['keep_tmp_db'] = False
         config_dictionary['General']['ff-version'] += 1
-        config_dictionary['General']['repo'] = "https://hg.mozilla.org/mozilla-beta"
 
         call_counter += 1
 
diff --git a/tests/functionality_two_platforms.py b/tests/functionality_two_platforms.py
index a24677c7..06fd4204 100755
--- a/tests/functionality_two_platforms.py
+++ b/tests/functionality_two_platforms.py
@@ -27,7 +27,7 @@
 from components.dbc import DatabaseProvider
 from components.dbmodels import JOBSTATUS, JOBOUTCOME
 from components.mach_vendor import VendorProvider
-from components.hg import MercurialProvider
+from components.git import GitProvider
 from components.scmprovider import SCMProvider
 from apis.taskcluster import TaskclusterProvider
 from apis.phabricator import PhabricatorProvider
@@ -86,7 +86,7 @@ def COMMAND_MAPPINGS(expected_values, command_callbacks):
     # bugzilla server which provides no additional logic coverage
     'Bugzilla': MockedBugzillaProvider,
     # Not Mocked At All
-    'Mercurial': MercurialProvider,
+    'Git': GitProvider,
     # Not Mocked At All, but does point to a fake server
     'Taskcluster': TaskclusterProvider,
     # Not Mocked At All
@@ -121,7 +121,6 @@ def _setup(self,
                 'env': 'dev',
                 'gecko-path': '.',
                 'ff-version': 87,
-                'repo': 'https://hg.mozilla.org/mozilla-central',
                 'separate-platforms': True
             },
             'Command': {'test_mappings': None},
@@ -135,7 +134,7 @@ def _setup(self,
                 'assert_assignee_func': assert_assignee_func,
                 'assert_prior_bug_reference': assert_prior_bug_reference
             },
-            'Mercurial': {},
+            'Git': {},
             'Taskcluster': {
                 'url_treeherder': 'http://localhost:27490/',
                 'url_taskcluster': 'http://localhost:27490/',
@@ -1713,7 +1712,6 @@ def abandon_callback(cmd):
             config_dictionary = copy.deepcopy(u.config_dictionary)
             config_dictionary['Database']['keep_tmp_db'] = False
             config_dictionary['General']['ff-version'] += 1
-            config_dictionary['General']['repo'] = "https://hg.mozilla.org/mozilla-beta"
 
             u = Updatebot(config_dictionary, PROVIDERS)
 
diff --git a/tests/functionality_utilities.py b/tests/functionality_utilities.py
index 5ad07cb0..7f384409 100644
--- a/tests/functionality_utilities.py
+++ b/tests/functionality_utilities.py
@@ -69,13 +69,7 @@ def default_phab_submit():
         ("./mach vendor --patch-mode only", command_callbacks.get('patch', AssertFalse)),
         ("./mach vendor --check-for-update", command_callbacks.get('check_for_update', lambda: expected_values.library_new_version_id() + " 2020-08-21T15:13:49.000+02:00")),
         ("./mach vendor ", command_callbacks.get('vendor', lambda: "")),
-        ("hg commit", command_callbacks.get('commit', lambda: "")),
-        ("hg checkout -C .", lambda: ""),
-        ("hg purge .", lambda: ""),
-        ("hg status", lambda: ""),
-        ("hg strip", lambda: ""),
-        ("hg log -r tip --template", lambda: "a61d07a72763"),
-        ("hg diff --stat", lambda: " accessible/interfaces/ia2/moz.build |  6 +++---\n 1 files changed, 3 insertions(+), 3 deletions(-)\n"),
+        ("git commit", command_callbacks.get('commit', lambda: "")),
         ("arc diff --verbatim", command_callbacks.get('phab_submit', default_phab_submit)),
         ("arcanist diff --verbatim", command_callbacks.get('phab_submit', default_phab_submit)),
         (echo_str("echo {\"constraints\""), lambda: CONDUIT_USERNAME_SEARCH_OUTPUT),  # This is also used for differential.revision.search, that's alright