brew install jcolson/taps/<formula>
Or brew tap jcolson/taps and then brew install <formula>.
Or install via URL (which will not receive updates):
brew install https://raw.githubusercontent.com/jcolson/homebrew-taps/master/Formula/<formula>.rb
brew help, man brew or check Homebrew's documentation.
brew install jcolson/taps/maven-noopenjdk