brew install casacore/tap/<formula>
Or brew tap casacore/tap and then brew install <formula>.
Or, in a brew bundle Brewfile:
tap "test/tap"
brew "<formula>"brew help, man brew or check Homebrew's documentation.
This used to reside in https://github.com/ska-sa/homebrew-tap.
To access those older commits when you run git log, git blame and
other commands on your local clone, do
git fetch origin '+refs/replace/*:refs/replace/*'