You have just cloned a Git repository that contains a remote branch named critical-fix. You must begin work in a new local branch called hotfix that should track origin/critical-fix. For safety, the command must fail if hotfix already exists instead of silently resetting it. Which single Git command meets these requirements?
Using git checkout -b hotfix origin/critical-fix creates a new local branch named hotfix, sets its upstream to origin/critical-fix, and switches to it in one step. When a start-point in the form remote/branch is supplied, -b automatically configures tracking. If hotfix already exists, the command aborts with an error, preventing an unintended reset.
git checkout --track origin/critical-fix would create a branch named critical-fix, not hotfix. git checkout -B hotfix origin/critical-fix would succeed even if hotfix exists, forcibly resetting it to the remote start-point-exactly what the scenario seeks to avoid. git checkout --detach origin/critical-fix detaches HEAD at the remote commit and does not create any local branch or tracking relationship.
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What does the `-b` flag do in the `git checkout` command?
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What does it mean to 'track' a remote branch in Git?
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Why would the `git checkout -B` command be unsafe in this scenario?
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