Index: src/applications/repository/engine/PhabricatorRepositoryDiscoveryEngine.php
===================================================================
--- src/applications/repository/engine/PhabricatorRepositoryDiscoveryEngine.php
+++ src/applications/repository/engine/PhabricatorRepositoryDiscoveryEngine.php
@@ -88,10 +88,9 @@
 
       try {
         list($xml, $stderr) = $repository->execxRemoteCommand(
-          'log --xml --quiet --limit %d %s@%s',
+          'log --xml --quiet --limit %d %s',
           $limit,
-          $repository->getSubversionBaseURI(),
-          $at_rev);
+          $repository->getSubversionBaseURI($at_rev));
       } catch (CommandException $ex) {
         $stderr = $ex->getStdErr();
         if (preg_match('/(path|File) not found/', $stderr)) {
Index: src/applications/repository/storage/PhabricatorRepository.php
===================================================================
--- src/applications/repository/storage/PhabricatorRepository.php
+++ src/applications/repository/storage/PhabricatorRepository.php
@@ -155,12 +155,12 @@
     return $this->getDetail('local-path');
   }
 
-  public function getSubversionBaseURI() {
+  public function getSubversionBaseURI($commit = null) {
     $subpath = $this->getDetail('svn-subpath');
     if (!strlen($subpath)) {
       $subpath = null;
     }
-    return $this->getSubversionPathURI($subpath);
+    return $this->getSubversionPathURI($subpath, $commit);
   }
 
   public function getSubversionPathURI($path = null, $commit = null) {
Index: src/applications/repository/storage/__tests__/PhabricatorRepositoryTestCase.php
===================================================================
--- src/applications/repository/storage/__tests__/PhabricatorRepositoryTestCase.php
+++ src/applications/repository/storage/__tests__/PhabricatorRepositoryTestCase.php
@@ -94,6 +94,17 @@
     $this->assertEqual(
       'file:///var/repo/SVN/%3F@22',
       $repo->getSubversionPathURI('?', 22));
+
+    $repo->setDetail('svn-subpath', 'quack/trunk/');
+
+    $this->assertEqual(
+      'file:///var/repo/SVN/quack/trunk/@',
+      $repo->getSubversionBaseURI());
+
+    $this->assertEqual(
+      'file:///var/repo/SVN/quack/trunk/@HEAD',
+      $repo->getSubversionBaseURI('HEAD'));
+
   }