Didn't work.

index.php

@@ -31,7 +31,12 @@
   }
 
   function get_commit_msg (string $fp) : string {
-    return date("Y/m/d H:i:s", filemtime($fp.".git/COMMIT_EDITMSG")).": ".trim(file_get_contents($fp.".git/COMMIT_EDITMSG"));
+    $res = file_get_contents($fp.".git/logs/refs/heads/".git_branch($fp));
+    $res = explode("\n", $res);
+    $res = $res[array_key_last($res)-1];
+    $res = strstr($res, "commit: ");
+    $res = str_replace("commit: ", "", $res);
+    return trim($res);
   }
 
   function ls (string $fp = "") : array|bool {