When is it safe to use `git commit --amend` on a commit without causing potential issues for collaborators?

It is safe to use `git commit --amend` on a commit without causing potential issues for collaborators only when that specific commit has not yet been pushed to any shared remote repository. This means the commit must exist exclusively in your local repository's history and must not have been fetched or pulled by any other collaborator, either directly from your machine or indirectly from a shared remote. To understand why this is the case, first understand what `git commit --amend` does. When you use `git commit --amend`, Git does not modify the existing commit in place. Instead, it creates an entirely new commit object that replaces the most recent commit on your current branch. This new commit will have a different unique identifier, known as a SHA-1 hash, compared to the original c....