$ git clone -n https://src.fedoraproject.org/rpms/vdr-vnsiserver.git /var/lib/mock/f42-build-864198-172199/root/chroot_tmpdir/scmroot/vdr-vnsiserver
Cloning into '/var/lib/mock/f42-build-864198-172199/root/chroot_tmpdir/scmroot/vdr-vnsiserver'...
$ git fetch origin 3c68e501ba2e3dbfd9c19bcd253714b08700f872:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vdr-vnsiserver
 * [new ref]         3c68e501ba2e3dbfd9c19bcd253714b08700f872 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3c68e50 Rebuilt for VDR 2.7.2