diff --git a/src/applications/diffusion/query/contains/DiffusionMercurialContainsQuery.php b/src/applications/diffusion/query/contains/DiffusionMercurialContainsQuery.php
index d796525c55..dbf40062ba 100644
--- a/src/applications/diffusion/query/contains/DiffusionMercurialContainsQuery.php
+++ b/src/applications/diffusion/query/contains/DiffusionMercurialContainsQuery.php
@@ -3,10 +3,16 @@
 final class DiffusionMercurialContainsQuery extends DiffusionContainsQuery {
 
   protected function executeQuery() {
+    $request = $this->getRequest();
+    $repository = $request->getRepository();
+    list($contains) = $repository->execxLocalCommand(
+      'log --template %s --limit 1 --rev %s --',
+      '{branch}',
+      $request->getCommit());
 
-    // TODO: Implement this.
-
-    return array();
+    return array(
+      trim($contains) => $request->getCommit(),
+    );
   }
 
 }