$ git clone -n https://src.fedoraproject.org/rpms/cjdns.git /var/lib/mock/f41-build-2441722-25470/root/chroot_tmpdir/scmroot/cjdns
Cloning into '/var/lib/mock/f41-build-2441722-25470/root/chroot_tmpdir/scmroot/cjdns'...
$ git fetch origin d166d0d3941d899c51d806eee9ea40567e8d833f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cjdns
 * [new ref]         d166d0d3941d899c51d806eee9ea40567e8d833f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d166d0d convert license to SPDX