git commit -n，git 解決ahead behind分叉以及刪除遠端commit

1. 解決ahead / behind

先reset到ahead,然后退回到分叉，再checkout 遠端的behind

git commit -n、如果要刪除本地的commit， 先到本地的最前端， 然后再用下面的命令

If you want to fix up your latest commit, you can undo the commit, and
unstage the files in it, by doing:

git reset HEAD~1 This will return your repository to its state before
the git add commands that staged the files. Your changes will be in
your working directory. HEAD~1 refers to the commit below the current
tip of the branch.

If you want to uncommit N commits, but keep the code changes in your
working directory:

git reset HEAD~N If you want to get rid of your latest commit, and do
not want to keep the code changes, you can do a “hard” reset.

git reset –hard HEAD~1 Likewise, if you want to discard the last N
commits, and do not want to keep the code changes:

git reset –hard HEAD~N

2.刪除遠端commit

先退回到正確的local commit然后
git push –force