How to clone a git repository without project folder?

To clone a repository into our current working directory without project folder, we can use the following command:

$ git init .

Syntax:
 
$ git remote add origin <repository-url>

Example:

$ git remote add origin git@github.com:username/repo.git

$ git fetch origin

$ git checkout master

Cloning project repository into an existing empty directory

$ git clone <repository-url> <existing-directory-path>

Cloning project repository into the current working directory

$ git clone <repository-url> .