$ git clone -n https://src.fedoraproject.org/rpms/rust-gix-worktree.git /var/lib/mock/f40-build-1807635-24881/root/chroot_tmpdir/scmroot/rust-gix-worktree
Cloning into '/var/lib/mock/f40-build-1807635-24881/root/chroot_tmpdir/scmroot/rust-gix-worktree'...
$ git fetch origin c39450807b891fced01768f958c1474a13f96f83:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gix-worktree
 * [new ref]         c39450807b891fced01768f958c1474a13f96f83 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c394508 Update to version 0.34.1 (rhbz#2299594)