$ git clone -n https://src.fedoraproject.org/rpms/shippy.git /var/lib/mock/f45-build-35910-700/root/chroot_tmpdir/scmroot/shippy
Cloning into '/var/lib/mock/f45-build-35910-700/root/chroot_tmpdir/scmroot/shippy'...
$ git fetch origin 8bef80ed57c1adf55e02e02337f94880ff6fbb23:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/shippy
 * [new ref]         8bef80ed57c1adf55e02e02337f94880ff6fbb23 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8bef80e Update to new release.