Description: The ‘Upstream Rebase’ is an operation in Git that allows incorporating changes from the upstream branch, meaning the main or reference branch of a project. This technique is used to maintain a cleaner and more linear commit history, making it easier to understand the evolution of the code. When performing a rebase, the commits from the current branch are applied on top of the upstream branch, meaning that the history of the current branch is rewritten to appear as if it was developed from the latest version of the upstream branch. This is especially useful in collaborative environments where multiple developers work on different features or bug fixes. Rebase helps avoid complicated merge conflicts and allows changes to be integrated more smoothly. However, it is important to be cautious when using rebase on shared branches, as rewriting history can cause issues for other collaborators working on the same branch. In summary, ‘Upstream Rebase’ is a powerful tool in Git that, when used correctly, can improve the clarity and organization of a project’s history.