$ git clone -n https://src.fedoraproject.org/rpms/checkpolicy.git /var/lib/mock/f40-build-1992536-43609/root/chroot_tmpdir/scmroot/checkpolicy
Cloning into '/var/lib/mock/f40-build-1992536-43609/root/chroot_tmpdir/scmroot/checkpolicy'...
$ git fetch origin 56b7ec916bf3779ce4d4796d44ed8c80404f7b8a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/checkpolicy
 * [new ref]         56b7ec916bf3779ce4d4796d44ed8c80404f7b8a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 56b7ec9 SELinux userspace 3.6-rc2 release