$ git clone -n https://src.fedoraproject.org/rpms/python-packvers.git /var/lib/mock/f45-build-31865-656/root/chroot_tmpdir/scmroot/python-packvers
Cloning into '/var/lib/mock/f45-build-31865-656/root/chroot_tmpdir/scmroot/python-packvers'...
$ git fetch origin a6eeddb4fd09df87ff6553bbe0ec0bf21d3b0ff1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-packvers
 * [new ref]         a6eeddb4fd09df87ff6553bbe0ec0bf21d3b0ff1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a6eeddb Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild