[mhodgson]

I'm not sure I follow. Our use case required the ability to easily update blobs (in this case formatted written text) without having to rewrite history every time. I don't immutable ref ids addresses that particular requirement...

[anulman]

Not sure they would either, though perhaps a use case for git_commit_amend [1]?

Regardless, sounds fairly implementation-specific. Think I just followed you on Twitter, happy to discuss further offline.

[1] https://libgit2.github.com/libgit2/#HEAD/group/commit/git_co...