How is git used as other than the project's version control?

I'm interested in finding out how people use git "on the side", when it is not the project's actual version control system.

I'm aware of the vague idea of using it to "go remote".

I'm sure I'll use it for non-programming topics just as an undo system.

But what about using it as a tool, wielded separately from applying those tools to a git repository infrastructure? For example, use it to separate out hunks and untangle mixed work. You could do this even if your directory has nothing to do with git normally.

--John (please forgive the footer; it's not my idea nor my choice)

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