$ git clone -n https://src.fedoraproject.org/rpms/checkpolicy.git /var/lib/mock/f42-build-867536-175610/root/chroot_tmpdir/scmroot/checkpolicy
Cloning into '/var/lib/mock/f42-build-867536-175610/root/chroot_tmpdir/scmroot/checkpolicy'...
$ git fetch origin 56eb93ce68882b569e4c3aae01803c48820ba203:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/checkpolicy
 * [new ref]         56eb93ce68882b569e4c3aae01803c48820ba203 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 56eb93c SELinux userspace 3.8-rc3 release