Using GitHub Importer

If your source code is stored on a code hosting service using Git, Subversion, Mercurial, or Team Foundation Version Control (TFVC) and is accessible from the public internet, you can move the code to GitHub using GitHub Importer.

If you have a project hosted on another version control system, you can automatically import it to GitHub using the GitHub Importer tool.

During an import, you can match commits in your repository with the GitHub account of the commit author.