test: ✅ use HEAD, including uncommitted changes, when testing (#185)

# Description

This allows us to test it with uncommitted changes.

This PR needs a quick review.

## Checklist

- [x] Ran `just run-all`

Author: lwjohnst86

test-template.sh

@@ -19,18 +19,16 @@ fi
 test_name="test-package-$hosting_provider"
 test_dir="$(pwd)/_temp/$is_seedcase_project/$test_name"
 template_dir="$(pwd)"
-# Use the latest commit for the template
-commit=$(git rev-parse HEAD)
 
 # Needs three arguments:
 #
 # 1. Template directory
 # 2. Destination directory
 # 3. VCS ref (commit, branch, tag, etc.)
 copy () {
-  # vcs-ref means the current commit/head, not a tag.
+  # `-r HEAD` means to copy from the current HEAD, including uncommitted changes
   uvx copier copy $1 $2 \
-    --vcs-ref=$3 \
+    -r HEAD \
     --defaults \
     --data is_seedcase_project=$is_seedcase_project \
     --data github_user="first-last" \
@@ -56,7 +54,7 @@ mkdir -p $test_dir
 echo "Testing copy for new projects when: 'is_seedcase_project'='$is_seedcase_project', 'hosting_provider'='$hosting_provider' -----------"
 (
   cd $test_dir &&
-    copy $template_dir $test_dir $commit &&
+    copy $template_dir $test_dir &&
     git init -b main &&
     git add . &&
     git commit --quiet -m "test: initial copy" &&
@@ -66,7 +64,7 @@ echo "Testing copy for new projects when: 'is_seedcase_project'='$is_seedcase_pr
     git add . &&
     git commit --quiet -m "test: preparing to recopy from the template" &&
     uvx copier recopy \
-      --vcs-ref=$commit \
+      -r HEAD \
       --defaults \
       --overwrite \
       --skip-tasks \
@@ -76,7 +74,7 @@ echo "Testing copy for new projects when: 'is_seedcase_project'='$is_seedcase_pr
     rm .cz.toml .copier-answers.yml &&
     git add . &&
     git commit --quiet -m "test: preparing to copy onto an existing package" &&
-    copy $template_dir $test_dir $commit #&&
+    copy $template_dir $test_dir #&&
     # Checks and builds -----
     # just run-all
 )