diff --git a/src/applications/repository/management/PhabricatorRepositoryManagementRebuildIdentitiesWorkflow.php b/src/applications/repository/management/PhabricatorRepositoryManagementRebuildIdentitiesWorkflow.php
--- a/src/applications/repository/management/PhabricatorRepositoryManagementRebuildIdentitiesWorkflow.php
+++ b/src/applications/repository/management/PhabricatorRepositoryManagementRebuildIdentitiesWorkflow.php
@@ -18,7 +18,11 @@
           array(
             'name'     => 'all',
             'help'     => pht('Rebuild identities across all repositories.'),
-        ),
+          ),
+          array(
+            'name'     => 'quiet',
+            'help'     => pht('Suppress console output.'),
+          ),
         ));
   }
 
@@ -27,6 +31,7 @@
 
     $all = $args->getArg('all');
     $repositories = $args->getArg('repositories');
+    $quiet = $args->getArg('quiet');
 
     if ($all xor empty($repositories)) {
       throw new PhutilArgumentUsageException(
@@ -81,13 +86,17 @@
       if ($needs_update) {
         $commit->save();
         $data->save();
-        echo tsprintf(
-          "Rebuilt identities for %s.\n",
-          $commit->getDisplayName());
+        if (!$quiet) {
+          echo tsprintf(
+            "Rebuilt identities for %s.\n",
+            $commit->getDisplayName());
+        }
       } else {
-        echo tsprintf(
-          "No changes for %s.\n",
-          $commit->getDisplayName());
+        if (!$quiet) {
+          echo tsprintf(
+            "No changes for %s.\n",
+            $commit->getDisplayName());
+        }
       }
     }