I added that R binding a couple of months ago, and it is magical. I hated having to git log, copy the sha, and then 'git rebase -i [paste]' every time. I've mostly switched over to magit, but this is one thing I still use tig for.
For me, rebasing usually concerns roughly the last N commits, which is why I don't bother running `git rebase -i HEAD~N` and ignore and commits I don't want to modify.
