$ git clone -n https://src.fedoraproject.org/rpms/vdr-graphlcd.git /var/lib/mock/f40-build-1873822-25023/root/chroot_tmpdir/scmroot/vdr-graphlcd
Cloning into '/var/lib/mock/f40-build-1873822-25023/root/chroot_tmpdir/scmroot/vdr-graphlcd'...
$ git fetch origin 463b2445b1bfc8aac7d9373d028c9d9ccafbccf6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vdr-graphlcd
 * [new ref]         463b2445b1bfc8aac7d9373d028c9d9ccafbccf6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 463b244 Rebuilt for new VDR API version 2.6.9