Edit the root commit in Git?

Question

There's ways to change the message from later commits:

git commit --amend                    # for the most recent commit
git rebase --interactive master~2     # but requires *parent*

How can you change the commit message of the very first commit (which has no parent)?

Answer 1

As of Git version 1.7.12, you may now use

git rebase -i --root

Documentation