Changing RSS title link to link to feed instead of blog

I don’t see any easy way in source.

That link is retrieved from feed by SimplePie method and is not passing through any deliberate filters. And it gets concatenated with rest of title after that is passed through filter, not before.

The only idea I have is to filter it in esc_url() function at clean_url hook, but that will only work nicely if link is unique and won’t break elsewhere… Or will take some messy hook juggling to target it precisely.