$ git clone -n https://src.fedoraproject.org/rpms/python-astropy.git /var/lib/mock/f41-build-side-2-python-2688897-30187/root/chroot_tmpdir/scmroot/python-astropy
Cloning into '/var/lib/mock/f41-build-side-2-python-2688897-30187/root/chroot_tmpdir/scmroot/python-astropy'...
$ git fetch origin 64b81b6c3b9ef6a89d9bc9bffd018d4e5c88f626:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-astropy
 * [new ref]         64b81b6c3b9ef6a89d9bc9bffd018d4e5c88f626 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 64b81b6 Write the test macro correctly