Fix Notify Create Ref Error on tag creation (#8936)

* Fix Notify Create Ref Error on tag creation

* Just use the provided full ref instead of BranchCommit

modules/notification/webhook/webhook.go

@@ -573,9 +573,9 @@ func (m *webhookNotifier) NotifyCreateRef(pusher *models.User, repo *models.Repo
 		return
 	}
 
-	shaSum, err := gitRepo.GetBranchCommitID(refName)
+	shaSum, err := gitRepo.GetRefCommitID(refFullName)
 	if err != nil {
-		log.Error("GetBranchCommitID[%s]: %v", refFullName, err)
+		log.Error("GetRefCommitID[%s]: %v", refFullName, err)
 		return
 	}