git checkout command copy the file for you

book\02-git-basics\sections\undoing.asc line 125

A note talking about git checkout command:

```
Any changes you made to that file are gone – you just copied another file over it.
```

User runs that command, and git does the copy for user.

Is this better?

```
Any changes you made to that file are gone – Git just copied another file over it.
```

`you` => `Git`
