I\'m getting an error saying:
failed to clone https://github.com/php-fig/log.git, git was not found, check that it is installed and in your PATH env. \'git\
You'll need to add git to your system PATH if you want to use it in regular command prompt.
Here's a guide on modifying your system path in Windows:
http://www.computerhope.com/issues/ch000549.htm