I have created an empty github repository then cloned it, navigated inside the directory and used the command laravel new this always created all the required files within current directory with no issues no name required.
@AaronMangan Laravel installation with --force would allow me to install into existing folder but it also deleted my .git folder before Laravel was installed. So this was not a solution.
Solution was (as wrote codelando above) to clone my empty git repository to another folder. And after normal Laravel installation of new project (into not existing folder) I had to copy the .git folder (from the cloned folder) to the folder with newly installed Laravel project.