$ git clone -n https://src.fedoraproject.org/rpms/python-astroquery.git /var/lib/mock/f42-build-side-1-3566325-46733/root/chroot_tmpdir/scmroot/python-astroquery
Cloning into '/var/lib/mock/f42-build-side-1-3566325-46733/root/chroot_tmpdir/scmroot/python-astroquery'...
$ git fetch origin 4be04cff33c08502d83954811f3acd1470d93db8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-astroquery
 * [new ref]         4be04cff33c08502d83954811f3acd1470d93db8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4be04cf New upstrem source 0.4.10