I'm currently working with a branch of my project with a major rewrite, with almost 200 commits on top of the default branch.

From time to time, I notice there's some small aspect I've missed in an earlier part of the rewrite, so I create a follow-up fixup commit. Then I'd like to rebase to integrate the commit into the original one.

However, with 200 commits, it gets hard to find the commit I'd like to combine the new one with! It would help tremendously if I had a way to search in the list of commits, similarly to what's possible when using a normal text editor for the git-rebase-todo file. Matching words in the commit subjects would then be highlighted, so that I can locate the commit and move the newest one there.