HEAD is now at c1a9ce62a Merge pull request #13163 from Homebrew /dependabot/bundler/Library/Homebrew/rubocop-rspec-2.10.0 · Homebrew · Discussion #3202 · GitHub
How to Open a Homebrew Pull Request — Homebrew Documentation
Error when installing… Something about "HEAD is now at f6ab300fc" · Homebrew · Discussion #3146 · GitHub