diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
--- a/src/__phutil_library_map__.php
+++ b/src/__phutil_library_map__.php
@@ -581,6 +581,7 @@
     'DiffusionQueryPathsConduitAPIMethod' => 'applications/diffusion/conduit/DiffusionQueryPathsConduitAPIMethod.php',
     'DiffusionRawDiffQuery' => 'applications/diffusion/query/rawdiff/DiffusionRawDiffQuery.php',
     'DiffusionRawDiffQueryConduitAPIMethod' => 'applications/diffusion/conduit/DiffusionRawDiffQueryConduitAPIMethod.php',
+    'DiffusionRawDiffStatQueryConduitAPIMethod' => 'applications/diffusion/conduit/DiffusionRawDiffStatQueryConduitAPIMethod.php',
     'DiffusionReadmeView' => 'applications/diffusion/view/DiffusionReadmeView.php',
     'DiffusionRefNotFoundException' => 'applications/diffusion/exception/DiffusionRefNotFoundException.php',
     'DiffusionRefTableController' => 'applications/diffusion/controller/DiffusionRefTableController.php',
@@ -3949,6 +3950,7 @@
     'DiffusionQueryPathsConduitAPIMethod' => 'DiffusionQueryConduitAPIMethod',
     'DiffusionRawDiffQuery' => 'DiffusionQuery',
     'DiffusionRawDiffQueryConduitAPIMethod' => 'DiffusionQueryConduitAPIMethod',
+    'DiffusionRawDiffStatQueryConduitAPIMethod' => 'DiffusionQueryConduitAPIMethod',
     'DiffusionReadmeView' => 'DiffusionView',
     'DiffusionRefNotFoundException' => 'Exception',
     'DiffusionRefTableController' => 'DiffusionController',
diff --git a/src/applications/diffusion/conduit/DiffusionRawDiffStatQueryConduitAPIMethod.php b/src/applications/diffusion/conduit/DiffusionRawDiffStatQueryConduitAPIMethod.php
new file mode 100644
--- /dev/null
+++ b/src/applications/diffusion/conduit/DiffusionRawDiffStatQueryConduitAPIMethod.php
@@ -0,0 +1,72 @@
+<?php
+
+final class DiffusionRawDiffStatQueryConduitAPIMethod
+  extends DiffusionQueryConduitAPIMethod {
+
+  public function getAPIMethodName() {
+    return 'diffusion.rawdiffstatquery';
+  }
+
+  public function getMethodDescription() {
+    return pht(
+      'Get raw diff stat information from '.
+      'a repository for a specific commit.');
+  }
+
+  protected function defineReturnType() {
+    return 'string';
+  }
+
+  protected function defineCustomParamTypes() {
+    return array(
+      'commit' => 'required string',
+    );
+  }
+
+  protected function getResult(ConduitAPIRequest $request) {
+    $drequest = $this->getDiffusionRequest();
+
+    $vcs = $drequest->getRepository()->getVersionControlSystem();
+    $is_git = ($vcs == PhabricatorRepositoryType::REPOSITORY_TYPE_GIT);
+    if (!$is_git) {
+      throw new Exception(pht(
+        'This method can only be called on Git repositories.'));
+    }
+
+    // Check if the commit has parents. We're testing to see whether it is the
+    // first commit in history (in which case we must use "git log") or some
+    // other commit (in which case we can use "git diff"). We'd rather use
+    // "git diff" because it has the right behavior for merge commits, but
+    // it requires the commit to have a parent that we can diff against. The
+    // first commit doesn't, so "commit^" is not a valid ref.
+    list($parents) = $drequest->getRepository()->execxLocalCommand(
+      'log -n1 --format=%s %s',
+      '%P',
+      $request->getValue('commit'));
+
+    $use_log = !strlen(trim($parents));
+    if ($use_log) {
+      // This is the first commit so we need to use "log". We know it's not a
+      // merge commit because it couldn't be merging anything, so this is safe.
+
+      // NOTE: "--pretty=format: " is to disable diff output, we only want the
+      // part we get from "--raw".
+      list($raw) = $drequest->getRepository()->execxLocalCommand(
+        'log -n1 -M -C -B --find-copies-harder --raw -t '.
+          '--pretty=format: --abbrev=40 %s',
+        $request->getValue('commit'));
+    } else {
+      // Otherwise, we can use "diff", which will give us output for merges.
+      // We diff against the first parent, as this is generally the expectation
+      // and results in sensible behavior.
+      list($raw) = $drequest->getRepository()->execxLocalCommand(
+        'diff -n1 -M -C -B --find-copies-harder --raw -t '.
+          '--abbrev=40 %s^1 %s',
+        $request->getValue('commit'),
+        $request->getValue('commit'));
+    }
+
+    return $raw;
+  }
+
+}
diff --git a/src/applications/repository/worker/commitchangeparser/PhabricatorRepositoryGitCommitChangeParserWorker.php b/src/applications/repository/worker/commitchangeparser/PhabricatorRepositoryGitCommitChangeParserWorker.php
--- a/src/applications/repository/worker/commitchangeparser/PhabricatorRepositoryGitCommitChangeParserWorker.php
+++ b/src/applications/repository/worker/commitchangeparser/PhabricatorRepositoryGitCommitChangeParserWorker.php
@@ -7,38 +7,18 @@
     PhabricatorRepository $repository,
     PhabricatorRepositoryCommit $commit) {
 
-    // Check if the commit has parents. We're testing to see whether it is the
-    // first commit in history (in which case we must use "git log") or some
-    // other commit (in which case we can use "git diff"). We'd rather use
-    // "git diff" because it has the right behavior for merge commits, but
-    // it requires the commit to have a parent that we can diff against. The
-    // first commit doesn't, so "commit^" is not a valid ref.
-    list($parents) = $repository->execxLocalCommand(
-      'log -n1 --format=%s %s',
-      '%P',
-      $commit->getCommitIdentifier());
-
-    $use_log = !strlen(trim($parents));
-    if ($use_log) {
-      // This is the first commit so we need to use "log". We know it's not a
-      // merge commit because it couldn't be merging anything, so this is safe.
-
-      // NOTE: "--pretty=format: " is to disable diff output, we only want the
-      // part we get from "--raw".
-      list($raw) = $repository->execxLocalCommand(
-        'log -n1 -M -C -B --find-copies-harder --raw -t '.
-          '--pretty=format: --abbrev=40 %s',
-        $commit->getCommitIdentifier());
-    } else {
-      // Otherwise, we can use "diff", which will give us output for merges.
-      // We diff against the first parent, as this is generally the expectation
-      // and results in sensible behavior.
-      list($raw) = $repository->execxLocalCommand(
-        'diff -n1 -M -C -B --find-copies-harder --raw -t '.
-          '--abbrev=40 %s^1 %s',
-        $commit->getCommitIdentifier(),
-        $commit->getCommitIdentifier());
-    }
+    $viewer = PhabricatorUser::getOmnipotentUser();
+    $raw = DiffusionQuery::callConduitWithDiffusionRequest(
+      $viewer,
+      DiffusionRequest::newFromDictionary(
+        array(
+          'repository' => $repository,
+          'user' => $viewer,
+        )),
+      'diffusion.rawdiffstatquery',
+      array(
+        'commit' => $commit->getCommitIdentifier(),
+      ));
 
     $changes = array();
     $move_away = array();