git 撤销修改，删除工作区域内容

$ git status
On branch machine_unit/machine-unit-list
Your branch is up to date with 'origin/machine_unit/machine-unit-list'.

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:   apps/machine_unit/views.py
        modified:   "docs/Chapter7/\346\234\272\347\273\204\345\210\227\350\241\250\347\232\204\345\237\272\346\234\254\351\200\273\350\276\221.md"
        modified:   templates/base_tpl/base-list-commom.html

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

#  首先撤销第一个文件的修改
$ git checkout -- apps/machine_unit/views.py

# 使用git status进行确认
$ git status
On branch machine_unit/machine-unit-list
Your branch is up to date with 'origin/machine_unit/machine-unit-list'.

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:   "docs/Chapter7/\346\234\272\347\273\204\345\210\227\350\241\250\347\232\204\345\237\272\346\234\254\351\200\273\350\276\221.md"
        modified:   templates/base_tpl/base-list-commom.html

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

# 继续撤销下面的两个文件
$ git checkout -- docs/Chapter7/机组列表的基本逻辑.md

$ git checkout -- templates/base_tpl/base-list-commom.html

# 查看已经清除感觉工作区域了。
$ git status
On branch machine_unit/machine-unit-list
Your branch is up to date with 'origin/machine_unit/machine-unit-list'.

nothing to commit, working tree clean