"What's New" widget, possible to change the origin data feed?

The main Application Page is displaying a “What’s New” rss reader,
Better said, probably an atom reader, I suppose this is the actual stream :

I would love to put my own rss/atom feed as data source, is it possible to do so ?
I quickly “grep” the source code, but I didn’t find it.

Thanks in advance.

Well, you are way ahead of us. This is not possible at this juncture. Although could you, please help us file a feature request/bug using the following link?- Sign in to GitHub · GitHub

Please include your use case and how it will be helpful for you.