$ git clone -n https://src.fedoraproject.org/rpms/mpc.git /var/lib/mock/f41-build-853415-166704/root/chroot_tmpdir/scmroot/mpc
Cloning into '/var/lib/mock/f41-build-853415-166704/root/chroot_tmpdir/scmroot/mpc'...
$ git fetch origin 6d9665f26156ba79affad49e5ce17d11b25628a0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mpc
 * [new ref]         6d9665f26156ba79affad49e5ce17d11b25628a0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6d9665f Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild