git mv command
The git mv command is used to move or rename a file, directory, or symbolic link.
git mv [file] [newfile]
If the new file name already exists, but you still want to rename it, you can use-fParameters:
git mv -f [file] [newfile]
We can add a README file (if there isn't one already):
$ git add README
Then rename it:
$ git mv README README.md $ ls README.md
other extensions