将开发分支merge到release分支后，push报错：
git push origin HEAD:refs/for/gac-release%topic="merge_v4.3.1_to_release"
Total 0 (delta 0), reused 0 (delta 0)
remote: Processing changes: refs: 1, done?? ?
To ssh://gerrit.xxxxxxxx.com/projectname
?! [remote rejected] HEAD -> refs/for/gac-release%topic=merge_v4.3.1_to_release (no new changes)
error: 无法推送一些引用到 'ssh://gerrit.xxxxxxxx.com/projectname
解决办法：
// 回退当前分支到初始状态
git reset xxxxxxxxxxxxxxxx
git merge v4.3.1 --no-ff???????????????????????????????????????????????????? //--no-ff，阻止fast forward???
git push origin HEAD:refs/for/gac-release%topic="merge_v4.3.1_to_release"
?
