Comment # 9 on bug 1106751 from Fabian Vogt

(In reply to Takashi Iwai from comment #8)
> Don't we have some OBS setup instead?  Putting back to kernel-source is a
> step back, make the whole effort useless.
>
> FWIW, the same problem is applied to a package like perf.  We need a general
> solution in OBS.

I can only think of a hacky way to (ab)use the rebuild bot: Add a fake
"-rebuildme" subpackage to kernel-default-base.spec which has
%(rpm -q --qf 'Requires: %{name} = %{version}-%{release}\n' kernel-default).

As the subpackage turns uninstallable once kernel-default changed, it would be
rebuilt.

@dimstar, @lnussel: Any better idea?