$ git clone -n https://src.fedoraproject.org/rpms/vdr-femon.git /var/lib/mock/f42-build-side-1-3588316-46944/root/chroot_tmpdir/scmroot/vdr-femon
Cloning into '/var/lib/mock/f42-build-side-1-3588316-46944/root/chroot_tmpdir/scmroot/vdr-femon'...
$ git fetch origin 410d58c4e44cfa1aa8efd003bd6bdcfb36668ec0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vdr-femon
 * [new ref]         410d58c4e44cfa1aa8efd003bd6bdcfb36668ec0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 410d58c Rebuilt for new VDR API version 2.7.4