Also wait for rebase, since that was just done

drupalorg/includes/DrupalorgIssueFork.php

@@ -610,7 +610,7 @@ class DrupalorgIssueFork extends Entity {
     ]));
     timer_start('merge_status_check');
     usleep($poll_delay);
-    while (in_array(($merge_status = $this->fetchMergeRequestInfo($iid)['detailed_merge_status']), ['unchecked', 'checking', 'preparing']) && timer_read('merge_status_check') < 60*1000) {
+    while (in_array(($merge_status = $this->fetchMergeRequestInfo($iid)['detailed_merge_status']), ['unchecked', 'checking', 'preparing', 'need_rebase']) && timer_read('merge_status_check') < 60*1000) {
       usleep($poll_delay);
     }
     return $merge_status;