Add and Restore
Type
git status
to see the status of this repository.

I created a file called hello.bat, but I have not added it to the repo. A file can be in the folder, but not managed by Git. Type
git add hello.bat
to stage file(s) hello.bat.

Prior to this, the file is not yet tracked. Stage means that a file is made ready to add to the repository but is not yet added. We can continue to make changes to that file without those changes being copied to the repository. None of those changes are recorded and it will not be possible to revert to these versions.
The format of the command is
git add name
to stage a file or directory.
If I think I have mangled the file I am working on, I can type
git restore filename
to get the last good version of the file in the repo and overwrite the one in my working directory.