direct: use local branch name, instead of remote

If we fetch only one commit and force fetch the branch to local,
it seems that the remote head ref is not actually set. So, we should
just use the local version anyway, as it's updated.

workflow-direct/main.go

@@ -211,7 +211,7 @@ func processConfiguredPushAction(action *common.PushWebhookEvent, config *common
 		common.LogError("Error fetching branch:", branch, "Ignoring as non-existent.", err)
 		return
 	}
-	id, err := git.GitRemoteHead(filepath.Join(gitPrj, action.Repository.Name), "origin", branch)
+	id, err := git.GitBranchHead(filepath.Join(gitPrj, action.Repository.Name), branch)
 	common.PanicOnError(err)
 	if action.Head_Commit.Id == id {
 		git.GitExecOrPanic(filepath.Join(gitPrj, action.Repository.Name), "checkout", id)