Added a regression test for get() ordering clearing.

tests/queries/tests.py

@@ -280,6 +280,14 @@ class Queries1Tests(BaseQuerysetTest):
         qs = qs.order_by('id')
         self.assertNotIn('OUTER JOIN', str(qs.query))
 
+    def test_get_clears_ordering(self):
+        """
+        get() should clear ordering for optimization purposes.
+        """
+        with CaptureQueriesContext(connection) as captured_queries:
+            Author.objects.order_by('name').get(pk=self.a1.pk)
+        self.assertNotIn('order by', captured_queries[0]['sql'].lower())
+
     def test_tickets_4088_4306(self):
         self.assertQuerysetEqual(
             Report.objects.filter(creator=1001),