Importing source code to GitHub
You can import repositories to GitHub using the command line or external migration tools.
Importing a Git repository using the command line→
Importing Git projects using the command line is suitable when your existing code is hosted on a private network.
Adding an existing project to GitHub using the command line→
Putting your existing work on GitHub Enterprise can let you share and collaborate in lots of great ways.
Source code migration tools→
You can use external tools to move your projects to GitHub.