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by bonzini 2197 days ago
The only git-specific aspect is that every clone of a repository gets a "master branch" (more precisely a branch named the same as the cloned repository's HEAD, but that is 99.9% of the time "master") and that is the only branch that is automatically created in the clone, just like a "master disk" is used to make copies of the disk.

This is actually a git concept not specific to GitHub.