$ git clone -n https://src.fedoraproject.org/rpms/vdr-epg2vdr.git /var/lib/mock/f41-build-815406-149450/root/chroot_tmpdir/scmroot/vdr-epg2vdr
Cloning into '/var/lib/mock/f41-build-815406-149450/root/chroot_tmpdir/scmroot/vdr-epg2vdr'...
$ git fetch origin 747a2991b2117edf4efc51f42266342b39332e10:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vdr-epg2vdr
 * [new ref]         747a2991b2117edf4efc51f42266342b39332e10 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 747a299 Rebuilt for new VDR API version 2.6.8