$ git clone -n https://src.fedoraproject.org/rpms/vdr-live.git /var/lib/mock/f40-build-2044577-48724/root/chroot_tmpdir/scmroot/vdr-live
Cloning into '/var/lib/mock/f40-build-2044577-48724/root/chroot_tmpdir/scmroot/vdr-live'...
$ git fetch origin 12b562c975ceb44987078dbdf1b3290e64f44c6c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vdr-live
 * [new ref]         12b562c975ceb44987078dbdf1b3290e64f44c6c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 12b562c Update to 3.3.2