Use the new API.

Author: joshaber

ObjectiveGit/GTRepository+RemoteOperations.m

@@ -17,6 +17,7 @@
 #import "GTSignature.h"
 #import "NSArray+StringArray.h"
 #import "NSError+Git.h"
+#import "GTRepository+References.h"
 
 #import "git2/errors.h"
 #import "git2/remote.h"
@@ -120,7 +121,7 @@ int GTFetchHeadEntriesCallback(const char *ref_name, const char *remote_url, con
 	GTRepository *repository = entriesPayload->repository;
 	GTRemoteEnumerateFetchHeadEntryBlock enumerationBlock = entriesPayload->enumerationBlock;
 
-	GTReference *reference = [GTReference referenceByLookingUpReferencedNamed:@(ref_name) inRepository:repository error:NULL];
+	GTReference *reference = [repository lookUpReferenceWithName:@(ref_name) error:NULL];
 
 	GTFetchHeadEntry *entry = [[GTFetchHeadEntry alloc] initWithReference:reference remoteURLString:@(remote_url) targetOID:[GTOID oidWithGitOid:oid] isMerge:(BOOL)is_merge];
 

ObjectiveGit/GTRepository.m

@@ -51,6 +51,7 @@
 #import "NSArray+StringArray.h"
 #import "NSError+Git.h"
 #import "NSString+Git.h"
+#import "GTRepository+References.h"
 
 #import "git2.h"
 
@@ -401,7 +402,7 @@ - (NSArray *)branchesWithPrefix:(NSString *)prefix error:(NSError **)error {
 	for (NSString *refName in references) {
 		if (![refName hasPrefix:prefix]) continue;
 
-		GTReference *ref = [[GTReference alloc] initByLookingUpReferenceNamed:refName inRepository:self error:error];
+		GTReference *ref = [self lookUpReferenceWithName:refName error:error];
 		if (ref == nil) continue;
 
 		GTBranch *branch = [[GTBranch alloc] initWithReference:ref repository:self];