git push 提示 Everything up-to-date 但是并未文件并未更新的解决办法

今天运行 git push 命令时，正常执行不报错，但是实际上文件并未上传更新到 github：

$ git push -u origin main
Everything up-to-date
branch 'main' set up to track 'origin/main'.

后来在 stackoverflow 上找到了一个解决办法，试了一下，成功解决，记录一下：

$git push -u origin HEAD:main
Enumerating objects: 86, done.
Counting objects: 100% (86/86), done.
Delta compression using up to 24 threads
Compressing objects: 100% (50/50), done.
Writing objects: 100% (51/51), 14.74 KiB | 7.37 MiB/s, done.
Total 51 (delta 33), reused 0 (delta 0), pack-reused 0
remote: Resolving deltas: 100% (33/33), completed with 30 local objects.
To https://github.com/www.codesou.cn/main.git
   24351d1..1d09a95  HEAD -> main

区别就是推送独立的 HEAD。