Just say your profanities aloud and don’t let them make it to version control.
In the first major software system I designed and helped build I was a little too open in my comments. For years after that software had entered sunset I’d still get Slack pings along the lines of: “This looks like a Maximum Derek comment: …” They were all diatribes about whatever was giving me grief when I was writing the code and they would all look perfectly at home in the script for 48 Hours (minus the racial or sexuality slurs).
In my defense we were working with PHP 5.3 at the time.