source :rubygems

gem 'combustion',
  :git => 'git://github.com/freelancing-god/combustion',
  :ref => 'd7a6836269a8fb528bc3721e9b8c06b5a62ef3cc'

gemspec

gem 'grape',
  :git => 'git://github.com/intridea/grape.git',
  :ref => '212c96cdfb253a59bc93790808c568e559d04468'