How it started: "It would be great if you could categorize changes using 5–10 colors and then have checkboxes that you can toggle to hide code corresponding to a color."
How it's going: https://gitmoji.dev/
IMHO, the novelty wears out fast. Especially when your git history starts looking like a Messages thread.
It would be in the "Files changed" section on GitHub, not in the git history. If you don't want to see the context, you can turn it off.