Why does composer create a .git folder?

Question

GitHub

How to get rid of the .git folder (which appears in the vendor/project folder)? when you install a library from a github repository via composer. So that when "composer install" it does not appear.

Answer 1

This is described in the composer install documentation :
There are two ways to download a package - source and dist. The default is dist for stable versions and source for others. Since you are installing from a repository, the source method is used.
Try Argument--prefer-dist

Answer 2

composer install --help:

--prefer-dist Forces installation from package dist even for dev versions.