$ git clone -n https://src.fedoraproject.org/rpms/vdr-tvguide.git /var/lib/mock/f42-build-side-1-3512394-46069/root/chroot_tmpdir/scmroot/vdr-tvguide
Cloning into '/var/lib/mock/f42-build-side-1-3512394-46069/root/chroot_tmpdir/scmroot/vdr-tvguide'...
$ git fetch origin 956b4c4e995ee8d817a81bc0b0d42ee797175aea:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vdr-tvguide
 * [new ref]         956b4c4e995ee8d817a81bc0b0d42ee797175aea -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 956b4c4 Rebuilt for new VDR API version 2.7.4