How to change the starting point of a branch?

Question

Usually I create a branch by running a command like git checkout -b [branch-name] [starting-branch]. In one case, I forgot to include the starting-branch

Answer 1

You want the branch to point to a different commit. You can do that by running

git branch -f  

Note that if branch-name is the current branch, you have to switch to a different branch first, for example with git checkout master.