Verification

• This issue's title and/or description do not reference a single formula e.g. brew install wget. If they do, open an issue at https://github.com/Homebrew/homebrew-core/issues/new/choose instead.

Provide a detailed description of the proposed feature

Homebrew should move to using the now GitHub and Git default of main for our branches.

We should start with less used taps e.g. Homebrew/homebrew-formula-analytics, move to more widely used taps Homebrew/homebrew-services, do so on Homebrew/homebrew-formula-core and Homebrew/homebrew-cask and end with Homebrew/brew.

It will be important to ensure that brew update, brew update-reset and brew test-bot all behave as expected.

What is the motivation for the feature?

Consistency across GitHub.

How will the feature be relevant to at least 90% of Homebrew users?

It's not.

What alternatives to the feature have been considered?

Leaving everything as master.