I guess you could sign a git note[1] on an existing commit. As a bonus you could add metadata about what you are actually signing off, like "approved" or even "

I guess you could sign a git note[1] on an existing commit. As a bonus you could add metadata about what you are actually signing off, like "approved" or even "rejected". Just adding an additional signature on top of an existing commit wouldn't carry too much info. What are you actually signing off on? Is it approval? Is it acknowledgement? And then it can be hard to sign off on something negative, like a code review that rejects. [1] https://git-scm.com/docs/git-notes https://git-scm.com/docs/git-notes