Viewing a repository's network
This repository insights graph is available in public repositories with GitHub Free, and in public and private repositories with GitHub Pro, GitHub Team, GitHub Enterprise Cloud, and GitHub Enterprise Server.
The network graph displays the branch history of the entire repository network, including branches of the root repository and branches of forks that contain commits unique to the network.
Tip: To see older branches, click and drag within the graph.
Accessing the network graph
On GitHub Enterprise, navigate to the main page of the repository.
Under your repository name, click Insights.
In the left sidebar, click Network.