$ git clone -n https://src.fedoraproject.org/rpms/vdr-epg2vdr.git /var/lib/mock/f42-build-side-1-3589200-46954/root/chroot_tmpdir/scmroot/vdr-epg2vdr
Cloning into '/var/lib/mock/f42-build-side-1-3589200-46954/root/chroot_tmpdir/scmroot/vdr-epg2vdr'...
$ git fetch origin 54c9bae635c53e2412f2ec590eab56c8b2e19ce3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vdr-epg2vdr
 * [new ref]         54c9bae635c53e2412f2ec590eab56c8b2e19ce3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 54c9bae Rebuilt for new VDR API version 2.7.4