fix Tag::getName

Author: alexandresalome

src/Gitonomy/Git/Reference/Stash.php

@@ -19,4 +19,8 @@
  */
 class Stash extends Reference
 {
+    public function getName()
+    {
+        return 'stash';
+    }
 }

src/Gitonomy/Git/Reference/Tag.php

@@ -24,8 +24,8 @@ class Tag extends Reference
 {
     public function getName()
     {
-        if (!preg_match('#^refs/tags/(.*)$#', $this->fullname, $vars)) {
-            throw new RuntimeException(sprintf('Cannot extract tag name from "%s"', $this->fullname));
+        if (!preg_match('#^refs/tags/(.*)$#', $this->revision, $vars)) {
+            throw new RuntimeException(sprintf('Cannot extract tag name from "%s"', $this->revision));
         }
 
         return $vars[1];