$ git clone -n https://src.fedoraproject.org/rpms/mc.git /var/lib/mock/f45-build-18162-510/root/chroot_tmpdir/scmroot/mc
Cloning into '/var/lib/mock/f45-build-18162-510/root/chroot_tmpdir/scmroot/mc'...
$ git fetch origin 908d0fec556a0891f377e131bf0d3db73c846869:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mc
 * [new ref]         908d0fec556a0891f377e131bf0d3db73c846869 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 908d0fe Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild