$ git clone -n https://src.fedoraproject.org/rpms/astrometry.git /var/lib/mock/f39-build-1866302-42556/root/chroot_tmpdir/scmroot/astrometry
Cloning into '/var/lib/mock/f39-build-1866302-42556/root/chroot_tmpdir/scmroot/astrometry'...
$ git fetch origin ea1160fd22bb792d5b5c8115381c6f0dcd58b201:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/astrometry
 * [new ref]         ea1160fd22bb792d5b5c8115381c6f0dcd58b201 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ea1160f Update to 0.94