diff --git a/src/repository/api/ArcanistGitAPI.php b/src/repository/api/ArcanistGitAPI.php
--- a/src/repository/api/ArcanistGitAPI.php
+++ b/src/repository/api/ArcanistGitAPI.php
@@ -535,7 +535,7 @@
       $stdout = $this->getHashFromFromSVNRevisionNumber($match[1]);
     } else {
       list($stdout) = $this->execxLocal(
-        'show -s --format=%C %s',
+        'show -s --format=%s %s --',
         '%H',
         $string);
     }
diff --git a/src/workflow/ArcanistBrowseWorkflow.php b/src/workflow/ArcanistBrowseWorkflow.php
--- a/src/workflow/ArcanistBrowseWorkflow.php
+++ b/src/workflow/ArcanistBrowseWorkflow.php
@@ -104,6 +104,12 @@
 
       $commits = array();
       foreach ($things as $key => $thing) {
+        if ($thing == '.') {
+          // Git resolves '.' like HEAD, but it should be interpreted to mean
+          // "the current directory". Just skip resolution and fall through.
+          continue;
+        }
+
         $commit = $repository_api->getCanonicalRevisionName($thing);
         if ($commit) {
           $commits[$commit] = $key;