diff --git a/src/applications/diffusion/conduit/ConduitAPI_diffusion_historyquery_Method.php b/src/applications/diffusion/conduit/ConduitAPI_diffusion_historyquery_Method.php
index 3d552d0725..8cf211509b 100644
--- a/src/applications/diffusion/conduit/ConduitAPI_diffusion_historyquery_Method.php
+++ b/src/applications/diffusion/conduit/ConduitAPI_diffusion_historyquery_Method.php
@@ -125,7 +125,7 @@ extends ConduitAPI_diffusion_abstractquery_Method {
       '{node};{parents}\\n',
       ($offset + $limit), // No '--skip' in Mercurial.
       $branch_arg,
-      hgsprintf('reverse(%s::%s)', '0', $commit_hash),
+      hgsprintf('reverse(ancestors(%s))', $commit_hash),
       $path_arg);
 
     $stdout = PhabricatorRepository::filterMercurialDebugOutput($stdout);
diff --git a/src/applications/diffusion/conduit/ConduitAPI_diffusion_lastmodifiedquery_Method.php b/src/applications/diffusion/conduit/ConduitAPI_diffusion_lastmodifiedquery_Method.php
index 26e679aec3..8cfa1f6f55 100644
--- a/src/applications/diffusion/conduit/ConduitAPI_diffusion_lastmodifiedquery_Method.php
+++ b/src/applications/diffusion/conduit/ConduitAPI_diffusion_lastmodifiedquery_Method.php
@@ -87,7 +87,7 @@ final class ConduitAPI_diffusion_lastmodifiedquery_Method
     list($hash) = $repository->execxLocalCommand(
       'log --template %s --limit 1 --removed --rev %s -- %s',
       '{node}',
-      hgsprintf('reverse(%s::%s)', '0', $drequest->getCommit()),
+      hgsprintf('reverse(ancestors(%s))',  $drequest->getCommit()),
       nonempty(ltrim($path, '/'), '.'));
 
     return $this->loadDataFromHash($hash);