$ git clone -n https://src.fedoraproject.org/rpms/checkpolicy.git /var/lib/mock/f40-build-2198376-51695/root/chroot_tmpdir/scmroot/checkpolicy
Cloning into '/var/lib/mock/f40-build-2198376-51695/root/chroot_tmpdir/scmroot/checkpolicy'...
$ git fetch origin c4dd7772492a35181e3205a3d9e9bd18603e8219:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/checkpolicy
 * [new ref]         c4dd7772492a35181e3205a3d9e9bd18603e8219 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c4dd777 SELinux userspace 3.6 release