I try not to. I'm usually professional, and I normally write (what I think are) good, informative commit messages.
$ git log | grep 'REDACTED_NAUGHTY_WORD_REGEX' | wc -l
$ git log --author="jsrn" | grep 'REDACTED_NAUGHTY_WORD_REGEX' | wc -l
Not bad for 5 years or so on this code base. I'm responsible for a mere 24% of the sweariness!
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