$ git clone -n https://src.fedoraproject.org/rpms/python-stuf.git /var/lib/mock/f45-build-33236-667/root/chroot_tmpdir/scmroot/python-stuf
Cloning into '/var/lib/mock/f45-build-33236-667/root/chroot_tmpdir/scmroot/python-stuf'...
$ git fetch origin 9f98d5bab5bb8d1557daf711d3e92c5a6ab5f327:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-stuf
 * [new ref]         9f98d5bab5bb8d1557daf711d3e92c5a6ab5f327 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9f98d5b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild