$ git clone -n https://src.fedoraproject.org/rpms/python-astropy.git /var/lib/mock/f41-build-815045-149384/root/chroot_tmpdir/scmroot/python-astropy
Cloning into '/var/lib/mock/f41-build-815045-149384/root/chroot_tmpdir/scmroot/python-astropy'...
$ git fetch origin 941e7ac1a69799079799d9c889d4d62fc3318e07:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-astropy
 * [new ref]         941e7ac1a69799079799d9c889d4d62fc3318e07 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 941e7ac New upstream source 6.0.1