$ git clone -n https://src.fedoraproject.org/rpms/poke.git /var/lib/mock/f45-build-28799-633/root/chroot_tmpdir/scmroot/poke
Cloning into '/var/lib/mock/f45-build-28799-633/root/chroot_tmpdir/scmroot/poke'...
$ git fetch origin 6783b8a8d04efcb53ce096fee7bd426f341a7d1c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/poke
 * [new ref]         6783b8a8d04efcb53ce096fee7bd426f341a7d1c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6783b8a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild