$ git clone -n https://src.fedoraproject.org/rpms/nanoflann.git /var/lib/mock/f42-build-3533039-46329/root/chroot_tmpdir/scmroot/nanoflann
Cloning into '/var/lib/mock/f42-build-3533039-46329/root/chroot_tmpdir/scmroot/nanoflann'...
$ git fetch origin 7994431d1820e83dfcbe63fcddbfc685485777f7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/nanoflann
 * [new ref]         7994431d1820e83dfcbe63fcddbfc685485777f7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7994431 Update to 1.7.0 upstream release