git-trac takes the repetition out of working with trac and git-svn. Easily download a patch, apply it at the right point in time, turn it into a commit with useful metadata, and check it out into a branch, all in one command. Created for (but not limited to) work on the Ruby on Rails core.
Gemfile gem 'git-trac', '~> 0.1.1'
install gem install git-trac