Apache Foundation about completing the work of integrating their infrastructure with GitHub and migrating all their git services to GitHub. Initially, two version control systems were offered for the development of Apache projects: the centralized version control system Subversion and the decentralized Git system.
Since 2014 on GitHub there have been read-only mirrors of Apache repositories. The repositories on GitHub are now promoted to primary and can be used to make and review changes. Apache's own git services have been moved to work as fallback mirrors.
More than 350 projects are developed under the auspices of the Apache Foundation, the total size of the active code base of which exceeds 200 million lines, and the total archive of changes accumulated over 20 years includes more than a billion lines of code, covering more than three million commits. Using GitHub instead of your own Git infrastructure will make it easier to work on projects and will allow you to use the tools already familiar to many new developers to submit changes, discuss and review code, as well as provide an opportunity to organize interaction with developers of other projects.
Source: opennet.ru