$ git clone -n https://src.fedoraproject.org/rpms/pybind11.git /var/lib/mock/f41-build-850732-165591/root/chroot_tmpdir/scmroot/pybind11
Cloning into '/var/lib/mock/f41-build-850732-165591/root/chroot_tmpdir/scmroot/pybind11'...
$ git fetch origin be018c931bdfd807926a5d07421977b0b3e48245:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pybind11
 * [new ref]         be018c931bdfd807926a5d07421977b0b3e48245 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at be018c9 Fix bogus date