From a9cf69c04a2792ac966d007219837d888639efc6 Mon Sep 17 00:00:00 2001
From: David Leadbeater <dgl@dgl.cx>
Date: Thu, 11 Dec 2025 17:18:19 +1100
Subject: [PATCH] Ensure the branch parameter really is a branch

Currently you can specify "Branch: HEAD" or "Branch: refs/tags/v1" and
go-git will resolve it to the relevant ref. Given the HTTP header is
called Branch this is confusing.
---
 src/fetch.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/fetch.go b/src/fetch.go
index be89920..133a487 100644
--- a/src/fetch.go
+++ b/src/fetch.go
@@ -57,7 +57,7 @@ func FetchRepository(
 		repo, err = git.CloneContext(ctx, storer, nil, &git.CloneOptions{
 			Bare:          true,
 			URL:           repoURL,
-			ReferenceName: plumbing.ReferenceName(branch),
+			ReferenceName: plumbing.NewBranchReferenceName(branch),
 			SingleBranch:  true,
 			Depth:         1,
 			Tags:          git.NoTags,