As reported by Sébastien¹, the ‘pre-push’ hook installed by ‘guix git authenticate’ fails when pushing the keyring branch because that branch is not authenticated.
I’ve seen other situations where it fails, and IIRC one of them is when pushing a tag. We should list these corner cases and have ‘guix git authenticate’ install a fixed hook. Ludo’. ¹ https://lists.gnu.org/archive/html/guix-devel/2024-11/msg00256.html
