Hello,

While testing a PR for guix git authenticate which uses libgit2 through guile-git, I had the following error:

$ ../create-git-hooks-dir/pre-inst-env guix git authenticate 9edb3f66fd807b096b48283debdcddccfea34bad   "BBB0 2DDF 2CEA F6A8 0D1D  E643 A2A0 6DF2 A33A 54FA"
guix git: error: Git error: unsupported extension name extensions.relativeworktree

It looks to me that this error is generated by libgit2 because the extension relativeworktree isn't supported.

To reproduce the issue, just create a worktree with the --relative-paths option. That will activate the extension relativeWorktrees:

Automatically set [relativeWorktrees] if a worktree has been created or repaired with either the --relative-paths option or with the worktree.useRelativePaths config set to true.

Could libgit2 support that useful extension recently added in git 2.48.0?