title: pre-commit.com hook to reject commit if a file contains a specific string
body: <p>Is there already a <a href="//pre-commit.com" rel="nofollow noreferrer">pre-commit.com</a> hook to reject commit if a file contains a specific string?</p>
  <p>I know how to do this with a git pre-commit hook: <a href="https://stackoverflow.com/a/26836281/633961">https://stackoverflow.com/a/26836281/633961</a></p>
  <p>But I would like to go the pre-commit.com way because this would streamline my way to a way which is done by other developers.</p>
  <p>For example I would like to use the same string which other people use, too.</p>