Doesn't look like this is easy to do by default with the `git` gem. The `log` method only supports a `count` paramater https://github.com/ruby-git/ruby-git/blob/861eb71e1c266606eefacf7ebd4bee4f34bee5de/lib/git/base/factory.rb#L39-L42 The `log_commits` method supports a few flags, but _not_ `all`. https://github.com/ruby-git/ruby-git/blob/861eb71e1c266606eefacf7ebd4bee4f34bee5de/lib/git/lib.rb#L129-L137 https://github.com/ruby-git/ruby-git/blob/861eb71e1c266606eefacf7ebd4bee4f34bee5de/lib/git/lib.rb#L1022-L1034