Select active branch when starting up

CommitsController.rb

@@ -36,7 +36,8 @@ def awakeFromNib
       hash[email] = NSImage.imageNamed(NSImageNameUser)
     end
 
-    if(fetch_git_repository)
+    if fetch_git_repository
+      fetch_git_branch
       setup_commit_detail_view
       fetch_commits_for @branch, @offset
       setup_branches_menu
@@ -235,6 +236,11 @@ def fetch_git_repository
     end
   end
 
+  def fetch_git_branch
+    head = @repo.head || @repo.heads.first
+    @branch = head.name.to_sym
+  end
+
   def fetch_commits_for(branch, quanity, offset = 0)
     @commits = @repo.commits(branch, quanity, offset)
   end