A git repository can support multiple working trees, allowin...

A git repository can support multiple working trees, allowing you to check out more than one branch at a time. With git worktree add a new working tree is associated with the repository, along with additional metadata that differentiates that working tree from others in the same repository. The working tree, along with this metadata, is called a “worktree”.

A copy of the data with a reference to the main history/timeline.

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