$ git clone -n https://src.fedoraproject.org/rpms/python-multiregex.git /var/lib/mock/f45-build-31648-654/root/chroot_tmpdir/scmroot/python-multiregex
Cloning into '/var/lib/mock/f45-build-31648-654/root/chroot_tmpdir/scmroot/python-multiregex'...
$ git fetch origin b36ab310639d50ad0ec63a815d368f14e97710a6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-multiregex
 * [new ref]         b36ab310639d50ad0ec63a815d368f14e97710a6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b36ab31 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild