Modifying the last commit is essential for fixing typos in commit messages or adding forgotten changes before pushing to shared repositories. As the creator of CoreUI, a widely used open-source UI library, I’ve amended countless commits to maintain clean project history over 25 years of development. From my expertise, the safest approach is using git commit --amend, which modifies the most recent commit without creating a new one. This keeps the commit history clean and is safe to use before pushing changes to remote repositories.