-U option failure on new branch

[AlexisTM]

When cloning an already cloned once repo with -U on a new branch, we get "the branch does not exist".

Reproduce:

1. Create a repo
2. Clone the repo with git cache clone -U repo -b main
3. Add a branch
4. Clone the repo again with
5. Pull the repo with git cache clone -U repo -b new_branch

[kaspar030]

Sorry for the delay and thanks for reporting! I'll look into it.

[kaspar030]

Alright, I finally got to this, but I can't reproduce the issue.

Adding -U to the git cache clone command correctly makes git cache do a git remote update on the mirror repo, as far as I can tell. That does pull any new branches in the upstream repo.

In step 3., where is that branch added? Is it pushed?
Is step 4. missing some words?

... or is this about multiple cache layers, where some git cache checkout is re-exported somehow?