GitHub has brilliant advanced search functionality, and what I wanted was:
is:pr commenter:lornajane sort:updated-desc
Which gives me a list of all the pull requests I've commented on, with the most recent first. I couldn't remember the exact repo name and I also often switch
is:issue as appropriate, but this search string has been very helpful for finding those odd things you want to follow up on.
Do you have a favourite GitHub search string combination? Would you care to share it in the comments? Thanks :)