diff --git a/src/repository/api/ArcanistGitAPI.php b/src/repository/api/ArcanistGitAPI.php
--- a/src/repository/api/ArcanistGitAPI.php
+++ b/src/repository/api/ArcanistGitAPI.php
@@ -446,6 +446,9 @@
       // would ship up the binaries for 'arc patch' but display the textconv
       // output in the visual diff.
       '--no-textconv',
+      // Provide a standard view of submodule changes; the 'log' and 'diff'
+      // values do not parse by the diff parser.
+      '--submodule=short',
     );
     return implode(' ', $options);
   }