Prune repo for deleted branches cleanup

Author: wronglink

app/services/github_hook/updater.rb

@@ -136,7 +136,7 @@ def time_diff_milli(start, finish)
     def update_repository(repository)
       command = git_command('fetch origin')
       if exec(command, repository.url)
-        command = git_command("fetch origin \"+refs/heads/*:refs/heads/*\"")
+        command = git_command("fetch --prune origin \"+refs/heads/*:refs/heads/*\"")
         exec(command, repository.url)
       end
     end

test/unit/github_hook/updater_test.rb

@@ -61,7 +61,7 @@ def test_fetches_changes_from_origin
 
   def test_resets_repository_when_fetch_origin_succeeds
     updater.expects(:exec).with("git fetch origin", repository.url).returns(true)
-    updater.expects(:exec).with("git fetch origin \"+refs/heads/*:refs/heads/*\"", repository.url)
+    updater.expects(:exec).with("git fetch --prune origin \"+refs/heads/*:refs/heads/*\"", repository.url)
     updater.call
   end