$ git clone -n https://src.fedoraproject.org/rpms/mup.git /var/lib/mock/f45-build-19325-547/root/chroot_tmpdir/scmroot/mup
Cloning into '/var/lib/mock/f45-build-19325-547/root/chroot_tmpdir/scmroot/mup'...
$ git fetch origin d9da1dad60bc3dedc4b9ba752914e6cebfd4cae8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mup
 * [new ref]         d9da1dad60bc3dedc4b9ba752914e6cebfd4cae8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d9da1da Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild