Undoing a problematic rebase is crucial when Git operations go wrong and you need to restore your previous commit history safely. As the creator of CoreUI with over 25 years of development experience managing Git repositories since the early 2000s, I’ve had to undo rebases numerous times when conflicts became too complex or the rebase result wasn’t what was intended. The most reliable approach is using git reflog to find the commit before the rebase and git reset --hard to restore that state. This method provides a complete recovery mechanism that restores your branch to exactly how it was before the rebase operation.