$ git clone -n https://src.fedoraproject.org/rpms/subscription-manager.git /var/lib/mock/f40-build-2042539-48546/root/chroot_tmpdir/scmroot/subscription-manager
Cloning into '/var/lib/mock/f40-build-2042539-48546/root/chroot_tmpdir/scmroot/subscription-manager'...
$ git fetch origin 05770c8b968083bf964825ef761988db1342bd8d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/subscription-manager
 * [new ref]         05770c8b968083bf964825ef761988db1342bd8d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 05770c8 spec: copy %changelog from upstream