$ git clone -n https://src.fedoraproject.org/rpms/gnome-nibbles.git /var/lib/mock/f39-build-1492091-34526/root/chroot_tmpdir/scmroot/gnome-nibbles
Cloning into '/var/lib/mock/f39-build-1492091-34526/root/chroot_tmpdir/scmroot/gnome-nibbles'...
$ git fetch origin 377fafae4152ec466246c62658fb8c7f9c33e204:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnome-nibbles
 * [new ref]         377fafae4152ec466246c62658fb8c7f9c33e204 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 377fafa Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild