add a method to pull refs (tags and branches) for a given commit

Author: mlhess

lib/Gitlab/Api/Repositories.php

@@ -176,6 +176,16 @@ public function commit($project_id, $sha)
         return $this->get($this->getProjectPath($project_id, 'repository/commits/'.$this->encodePath($sha)));
     }
 
+    /**
+     * @param int $project_id
+     * @param $sha
+     * @return mixed
+     */
+    public function commitrefs($project_id, $sha)
+    {
+        return $this->get($this->getProjectPath($project_id, 'repository/commits/'.$this->encodePath($sha) . '/refs'));
+    }
+
     /**
      * @param int $project_id
      * @param array $parameters (