$ git clone -n https://src.fedoraproject.org/rpms/python-moddb.git /var/lib/mock/f45-build-31590-654/root/chroot_tmpdir/scmroot/python-moddb
Cloning into '/var/lib/mock/f45-build-31590-654/root/chroot_tmpdir/scmroot/python-moddb'...
$ git fetch origin dfdd47d532fbbd32fd2e3e1bb78d595a10c22613:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-moddb
 * [new ref]         dfdd47d532fbbd32fd2e3e1bb78d595a10c22613 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dfdd47d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild