Open the same directory twice

Question

On command line, I could open a directory like:

    code .

Now, I want two of the identical diretory opened and displayed in another window.

Answer 1

In addition to accepted answer, here's the trick if you want to open same project in two different windows but showing two different git branches:

Copy the project folder and open that folder!

If you want two windows in two different git branches then this simple trick works. I don't know of any other solutions.