$ git clone -n https://src.fedoraproject.org/rpms/vdr-live.git /var/lib/mock/f40-build-2225195-52806/root/chroot_tmpdir/scmroot/vdr-live
Cloning into '/var/lib/mock/f40-build-2225195-52806/root/chroot_tmpdir/scmroot/vdr-live'...
$ git fetch origin e6b31539d753800ad7159d253c4774319abbc80f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vdr-live
 * [new ref]         e6b31539d753800ad7159d253c4774319abbc80f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e6b3153 Rebuilt for new VDR API version