$ git clone -n https://src.fedoraproject.org/rpms/vdr-epg2vdr.git /var/lib/mock/f40-build-2719795-73021/root/chroot_tmpdir/scmroot/vdr-epg2vdr
Cloning into '/var/lib/mock/f40-build-2719795-73021/root/chroot_tmpdir/scmroot/vdr-epg2vdr'...
$ git fetch origin 81220d5fe451e64f6b3769eb11b4c55ada4448f9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vdr-epg2vdr
 * [new ref]         81220d5fe451e64f6b3769eb11b4c55ada4448f9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 81220d5 Rebuilt for new VDR API version