I'm actually working on adding this to Retcon right now! It's one of the biggest feature requests. So far the implementation goes like this: you enter Edit mod

I'm actually working on adding this to Retcon right now! It's one of the biggest feature requests. So far the implementation goes like this: you enter Edit mode on a commit; you unstage some lines; and you confirm. The lines are yanked from the commit, and added to a new commit that you just have to title. I just use it on the Retcon repo and it's real cool to have.