Doubt they care too much about bad words in commit messages, what they should worry about is if they've ever checked in passwords/secrets/private keys and not re-written the git history
Commit messages that imply anti-competitive behaviour ("Committing a change to the API to lockout competitor XYZ").
Commit messages that imply code theft ("Using a method that we used at my previous company").
etc.
Sometimes things that look sketchy might be innocent but will still cause nightmares for twitch since they'll now have to play defensively as people call into question anything that ever went into the repo.
