diff --git a/services/git/compare.go b/services/git/compare.go
index 9e4645c5b1..6c49fff26a 100644
--- a/services/git/compare.go
+++ b/services/git/compare.go
@@ -65,7 +65,7 @@ func GetCompareInfo(ctx context.Context, baseRepo, headRepo *repo_model.Reposito
 	// if they are not the same repository, then we need to fetch the base commit into the head repository
 	// because we will use headGitRepo in the following code
 	if baseRepo.ID != headRepo.ID {
-		exist := headGitRepo.IsCommitExist(compareInfo.BaseCommitID)
+		exist := headGitRepo.IsReferenceExist(compareInfo.BaseCommitID)
 		if !exist {
 			if err := gitrepo.FetchRemoteCommit(ctx, headRepo, baseRepo, compareInfo.BaseCommitID); err != nil {
 				return nil, fmt.Errorf("FetchRemoteCommit: %w", err)