diff --git a/src/workflow/ArcanistLandWorkflow.php b/src/workflow/ArcanistLandWorkflow.php
--- a/src/workflow/ArcanistLandWorkflow.php
+++ b/src/workflow/ArcanistLandWorkflow.php
@@ -191,7 +191,7 @@
 
     if ($this->useSquash) {
       $this->rebase();
-      $this->squash();
+      $this->squash();      
     } else {
       $this->merge();
     }
@@ -936,6 +936,10 @@
         $repository_api->execxLocal(
           'commit -F %s',
           $this->messageFile);
+        if (phutil_is_windows()) {
+          // Occasionally on large repositories on Windows, Git can exit with an unclean working copy here.  This prevents reverts from being pushed to the remote when this occurs.
+          $this->requireCleanWorkingCopy();
+        }
       } else if ($this->isHg) {
         // hg rebase produces a commit earlier as part of rebase
         if (!$this->useSquash) {