Fix edit files

app/controllers/projects/edit_tree_controller.rb

@@ -10,7 +10,7 @@ class Projects::EditTreeController < Projects::ApplicationController
   before_filter :edit_requirements, only: [:show, :update]
 
   def show
-    @last_commit = @project.repository.last_commit_for(@ref, @path).sha
+    @last_commit = Gitlab::Git::Commit.last_for_path(@project.repository, @ref, @path).sha
   end
 
   def update

lib/gitlab/satellite/edit_file_action.rb

@@ -49,7 +49,7 @@ module Gitlab
       protected
 
       def can_edit?(last_commit)
-        current_last_commit = @project.repository.last_commit_for(ref, file_path).sha
+        current_last_commit = Gitlab::Git::Commit.last_for_path(@project.repository, ref, file_path).sha
         last_commit == current_last_commit
       end
     end