how to become a co-maintainer for an _existing_ RPM pkg

[Stefan Schulze Frielinghaus]

Hi,

I would like to become a co-maintainer for an _existing_ RPM package. I
already red the following link
https://fedoraproject.org/wiki/PackageMaintainers/Join but they are
always telling you how to act when you create a _new_ RPM package. I
contacted the actual RPM maintainer and he said that it would be good to
have a co-maintainer because he is the only one and could need some
support. So this shouldn't be a problem.

What do I have to do? Find a sponsor for an _existing_ RPM package?

cheers
Stefan