$ git clone -n https://src.fedoraproject.org/rpms/CGAL.git /var/lib/mock/f40-build-797304-141193/root/chroot_tmpdir/scmroot/CGAL
Cloning into '/var/lib/mock/f40-build-797304-141193/root/chroot_tmpdir/scmroot/CGAL'...
$ git fetch origin 2aab45f1e0a625de917e6183a5b7c4c565facc31:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/CGAL
 * [new ref]         2aab45f1e0a625de917e6183a5b7c4c565facc31 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2aab45f Update to 5.6.1 (#2269356)