Find out when a keyword (method name, constant) is added or removed in git

When refactoring it is sometimes useful to see when a method or constant was introduced or removed.

Copygit log -G'method_name'
git log -G'ConstantName'

If you see that a method is no longer used then you are safe to remove it. You can also see the context around why it was added which could make it easier to refactor.