$ git clone -n https://src.fedoraproject.org/rpms/python-astroML.git /var/lib/mock/f40-build-2256004-54271/root/chroot_tmpdir/scmroot/python-astroML
Cloning into '/var/lib/mock/f40-build-2256004-54271/root/chroot_tmpdir/scmroot/python-astroML'...
$ git fetch origin fd6f0ef5b06ca7815a4faeb93b8c8cddead8fdc0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-astroML
 * [new ref]         fd6f0ef5b06ca7815a4faeb93b8c8cddead8fdc0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fd6f0ef Fixes rhbz#2256755