Skip authenticity token checks for Git HTTP

app/controllers/projects/git_http_controller.rb

 class Projects::GitHttpController < Projects::ApplicationController
   attr_reader :user
+  # Git clients will not know what authenticity token to send along
+  skip_before_action :verify_authenticity_token
   skip_before_action :repository
   before_action :authenticate_user
   before_action :ensure_project_found!