diff --git a/server/upstream/helper.go b/server/upstream/helper.go
index 115c224..8847317 100644
--- a/server/upstream/helper.go
+++ b/server/upstream/helper.go
@@ -38,7 +38,7 @@ func GetBranchTimestamp(giteaClient *gitea.Client, owner, repo, branch string, b
 		result.Branch = defaultBranch
 	}
 
-	timestamp, err := giteaClient.GiteaGetRepoBranchTimestamp(owner, repo, branch)
+	timestamp, err := giteaClient.GiteaGetRepoBranchTimestamp(owner, repo, result.Branch)
 	if err != nil {
 		return nil
 	}