$ git clone -n https://src.fedoraproject.org/rpms/mu.git /var/lib/mock/f41-build-side-1-3129807-39586/root/chroot_tmpdir/scmroot/mu
Cloning into '/var/lib/mock/f41-build-side-1-3129807-39586/root/chroot_tmpdir/scmroot/mu'...
$ git fetch origin 446866a35e2473d95b6619b442d403075eeca81b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mu
 * [new ref]         446866a35e2473d95b6619b442d403075eeca81b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 446866a Rebuilt for https://fedoraproject.org/wiki/Fedora_41_Mass_Rebuild