How to replace master branch in Git, entirely, from another branch?

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To replace the master branch entirely with the contents of another branch in Git, you can use the git branch -f and git checkout commands. Here's a step-by-step example:

Let's assume you have a branch named new-branch with the changes you want to make the new master branch. You want to replace the existing master branch with the new-branch. Here's how you can do it:

bash
# Make sure you are on the branch you want to replace 'master' with (e.g., 'new-branch')
git checkout new-branch

# Force update the 'master' branch to point to the current branch
git branch -f master

# Check out the 'master' branch
git checkout master

In this example:

  1. First, make sure you are on the branch (new-branch) that contains the changes you want to replace the master branch with.

  2. Use the git branch -f command to force update the master branch to point to the same commit as the current branch (new-branch). This effectively moves the master branch to the same commit as new-branch, discarding the previous master branch history.

  3. Finally, check out the master branch using git checkout master to switch to the new master branch.

After running these commands, the master branch will now contain the same commits and changes as the new-branch, and the previous master branch's history will be discarded. Make sure you understand the implications of replacing the master branch, as it can result in data loss if not done carefully.

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