$ git clone -n https://src.fedoraproject.org/rpms/openfortivpn.git /var/lib/mock/f42-build-side-1-3589305-46957/root/chroot_tmpdir/scmroot/openfortivpn
Cloning into '/var/lib/mock/f42-build-side-1-3589305-46957/root/chroot_tmpdir/scmroot/openfortivpn'...
$ git fetch origin e43cfc3b41b9e81069e8f02d5195fa90aac53639:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/openfortivpn
 * [new ref]         e43cfc3b41b9e81069e8f02d5195fa90aac53639 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e43cfc3 Update to latest upstream version