$ git clone -n https://src.fedoraproject.org/rpms/mutter.git /var/lib/mock/f40-build-2298931-56572/root/chroot_tmpdir/scmroot/mutter
Cloning into '/var/lib/mock/f40-build-2298931-56572/root/chroot_tmpdir/scmroot/mutter'...
$ git fetch origin e35a0bc97a37a8828ff9b9a1842032a990a82ce4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mutter
 * [new ref]         e35a0bc97a37a8828ff9b9a1842032a990a82ce4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e35a0bc Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild