$ git clone -n https://src.fedoraproject.org/rpms/vdr-graphlcd.git /var/lib/mock/f42-build-864183-172199/root/chroot_tmpdir/scmroot/vdr-graphlcd
Cloning into '/var/lib/mock/f42-build-864183-172199/root/chroot_tmpdir/scmroot/vdr-graphlcd'...
$ git fetch origin d71318c678cf33ffb6dbd7cc7640a0a1a70b5163:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vdr-graphlcd
 * [new ref]         d71318c678cf33ffb6dbd7cc7640a0a1a70b5163 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d71318c Rebuilt for new VDR API version 2.7.2