Update notes might contain more than a single link. If there is rebase prepared for all supported branches, it might be useful to prepare notes in markdown file and pass it into the update multiple times.

But if I prepare multiline text, it is very weird to pass into notes command line parameter.

I would like:

fedpkg update --notes-file notes.md

It should work roughly the same way as:

fedpkg update --notes "$(cat notes.md)"

Which is possible, but not user friendly. I hope I am not the only person doing multiline comments, preparing maybe links to upstream document in them. Used editor will highlight markdown text when editing. But no user friendly way will then offer to use such file.