$ git clone -n https://src.fedoraproject.org/rpms/nanoflann.git /var/lib/mock/f40-build-798902-142042/root/chroot_tmpdir/scmroot/nanoflann
Cloning into '/var/lib/mock/f40-build-798902-142042/root/chroot_tmpdir/scmroot/nanoflann'...
$ git fetch origin 8a6fd0f82fc817f441f8ce8d4b02072a3a24894f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/nanoflann
 * [new ref]         8a6fd0f82fc817f441f8ce8d4b02072a3a24894f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8a6fd0f fix packit