In addition to the —abort option (with merge & rebase), there’s also the option of resetting to any state you desire, using either checkout or reset — and reflo

In addition to the —abort option (with merge & rebase), there’s also the option of resetting to any state you desire, using either checkout or reset — and reflog for viewing a list of the states you might want to reset to. (Or even better, just use a tool that shows the graph of the repository)