撤销并保留修改

参数 –soft

# 先进行commit ，之后后悔啦
$ git commit -am "对首篇报告研究员字段改为author_name"

执行git log

$ git log

commit 3d6788f577faba5e1d408e372031c81beee79749
Author: yous <yous.com>
Date:   Thu Dec 14 10:08:36 2017 +0800

    添加

commit 5029f0cc08cffb77f7358de7d5534e8f8eacb82e
Author: yous <yous.com>
Date:   Thu Dec 14 09:52:39 2017 +0800

    Revert "Revert "修改过程""

    This reverts commit c81f785a06804f5f40b41dedd038efbe6d83f8a8.

commit c81f785a06804f5f40b41dedd038efbe6d83f8a8
Author: yous <yous.com>
Date:   Thu Dec 14 09:52:22 2017 +0800

    Revert "修改"

    This reverts commit 5a1d18a032d8c9269613ff14593847f82043e627.

commit 5a1d18a032d8c9269613ff14593847f82043e627

可以看出，第一个是我刚刚commit的，我要撤销，当然是选择第二个；

执行命令git reset --soft <commit>

$ git reset --soft 5029f0cc08cf

之后我们查看下，状态：

$ git status
On branch yutao
Your branch is up-to-date with 'origin/yutao'.
Changes to be committed:
  (use "git reset HEAD <file>..." to unstage)

        modified:   dataservice/app/ggservice/v1/event/service/InfoEventService.java

可以看出已经回撤啦，并且保留了修改。

参数 –mixed

$ git reset --mixed 5029f0cc08cff
Unstaged changes after reset:
M       dataservice/app/ggservice/v1/event/service/InfoEventService.java

yutao@yutao MINGW64 /d/sts/workspace/ggservice (yutao)
$ git status
On branch yutao
Your branch is up-to-date with 'origin/yutao'.
Changes not staged for commit:
  (use "git add <file>..." to update what will be committed)
  (use "git checkout -- <file>..." to discard changes in working directory)

        modified:   dataservice/app/ggservice/v1/event/service/InfoEventService.java

no changes added to commit (use "git add" and/or "git commit -a")

这种方式也是可以的。 
参数--soft和--mixed区别：

git reset –hard <commit_id>

这种方式，我个人是不推荐，它也是撤销，但是不会保留修改。 
除非你确实是不想要刚刚commit的内容，否则，这个操作会让你之前干的活，白干。 
所以非常不推荐这个方式。