Use non released Rails version from Git (possibly by commit number)

Question

I'm trying to use Passenger to host my rails app, but as noted in this issue, logging is s little whacky in rails 3.2.1. Someone has released a commit (that has been pulled into the main branch) with a fix. How can I tell my app to use the main branch instead of a specific version of the rails gem? Also, is there a way I can specify that commit, in case the change is later overwritten by another pull?

Something like (in my Gemfile):

gem 'rails', git => 'git://github.com/rails/rails.git:<commit hash>'

Answer 1

The Bundler docs note that you can use a specific reference like so:

gem 'rails', :git => 'git://github.com/rails/rails.git', :ref => '55cc16f'