$ git clone -n https://src.fedoraproject.org/rpms/vdr-live.git /var/lib/mock/f40-build-766833-124356/root/chroot_tmpdir/scmroot/vdr-live
Cloning into '/var/lib/mock/f40-build-766833-124356/root/chroot_tmpdir/scmroot/vdr-live'...
$ git fetch origin f915fb4264b4622f41978ffedf85735e0c7e56b5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vdr-live
 * [new ref]         f915fb4264b4622f41978ffedf85735e0c7e56b5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f915fb4 Update to 3.3.3