$ composer config repositories.koncz-m2-trainig-orm git git@github.com:ksz2013/m2-training-orm.git
$ composer require koncz/m2-training-orm:dev-master
Manually:
Copy the zip into app/code/Training/Orm directory
$ php bin/magento module:enable Training_Orm --clear-static-content
$ php bin/magento setup:upgrade