$ git clone -n https://src.fedoraproject.org/rpms/vdr-live.git /var/lib/mock/f43-build-60943198-6586508/root/chroot_tmpdir/scmroot/vdr-live
Cloning into '/var/lib/mock/f43-build-60943198-6586508/root/chroot_tmpdir/scmroot/vdr-live'...
$ git fetch origin 497c837b42d3f1eca2138375a78b16d83699b066:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vdr-live
 * [new ref]         497c837b42d3f1eca2138375a78b16d83699b066 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 497c837 Update to 3.5.1