Comment # 6 on bug 1190738 from Fabian Vogt

One possible approach would be to have an otherwise empty kernel-changelog
package which can be required by everything.

That also avoids that the changelog is included multiple times for every kernel
subpackage, e.g. kernel-default, -extra, -optional, -devel, dtb* packages,
-devel, -macros, ... which currently end up in the RPM database without
compression or deduplication and take up noticable amounts of space.

(In reply to Michal Suchanek from comment #5)
> I don't think we can include the kernel changelog.
> 
> There are two problems: the kernel-default-base and the kernel changelog
> would need to be merged. There is a changelog merge tool which orders the
> entries chronologically which could be used with the caveat that the
> kernel-default-base changes would be lost among the kernel changes.
>
> The other problem is that the changelog merge would have to be done in the
> OBS by a service that runs before the package build starts. The build
> environment should be set up at this point so it should be technically
> possible to do but this part of OBS is very poorly documented. Also the
> custom service would have to be included in the official OBS instances.

buildtime services can be provided by any package.