diff --git a/src/applications/diffusion/query/lowlevel/DiffusionLowLevelResolveRefsQuery.php b/src/applications/diffusion/query/lowlevel/DiffusionLowLevelResolveRefsQuery.php
index 53dc6b30da..4e9ed246d9 100644
--- a/src/applications/diffusion/query/lowlevel/DiffusionLowLevelResolveRefsQuery.php
+++ b/src/applications/diffusion/query/lowlevel/DiffusionLowLevelResolveRefsQuery.php
@@ -31,6 +31,11 @@ final class DiffusionLowLevelResolveRefsQuery
       return array();
     }
 
+    $repository = $this->getRepository();
+    if (!$repository->hasLocalWorkingCopy()) {
+      return array();
+    }
+
     switch ($this->getRepository()->getVersionControlSystem()) {
       case PhabricatorRepositoryType::REPOSITORY_TYPE_GIT:
         $result = $this->resolveGitRefs();
diff --git a/src/applications/repository/storage/PhabricatorRepository.php b/src/applications/repository/storage/PhabricatorRepository.php
index 5705bb719c..f23661cfbe 100644
--- a/src/applications/repository/storage/PhabricatorRepository.php
+++ b/src/applications/repository/storage/PhabricatorRepository.php
@@ -1477,6 +1477,15 @@ final class PhabricatorRepository extends PhabricatorRepositoryDAO
     return false;
   }
 
+  public function hasLocalWorkingCopy() {
+    try {
+      self::assertLocalExists();
+      return true;
+    } catch (Exception $ex) {
+      return false;
+    }
+  }
+
   /**
    * Raise more useful errors when there are basic filesystem problems.
    */