$ git clone -n https://src.fedoraproject.org/rpms/python-astropy.git /var/lib/mock/f40-build-731328-103857/root/chroot_tmpdir/scmroot/python-astropy
Cloning into '/var/lib/mock/f40-build-731328-103857/root/chroot_tmpdir/scmroot/python-astropy'...
$ git fetch origin 5adbb6a6d1161f2b7bdc8e67cf8b5ea6e1ecfcf7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-astropy
 * [new ref]         5adbb6a6d1161f2b7bdc8e67cf8b5ea6e1ecfcf7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5adbb6a New upstream source 5.3.2