$ git clone -n https://src.fedoraproject.org/rpms/messiggy.git /var/lib/mock/f41-build-772465-13505/root/chroot_tmpdir/scmroot/messiggy
Cloning into '/var/lib/mock/f41-build-772465-13505/root/chroot_tmpdir/scmroot/messiggy'...
$ git fetch origin 9b9a9e24a1a29dd6b6b1fff443ea947093c75604:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/messiggy
 * [new ref]         9b9a9e24a1a29dd6b6b1fff443ea947093c75604 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9b9a9e2 Eliminate use of obsolete %patchN syntax (#2283636)