How to start a tutorial from scratch

I am trying to follow the tutorial at The Deploy failed and looking at the Deploy log I realized that I initiated the deploy process way prematurely (missed any tasks starting with
Understanding what is the reason for deployment failure, I would like to do it again and my question is where do I start from. Equivalently, what are the side-effects of the above mentioned tutorial

In the case someone else is going through this same tutorial I would suggest the most likely answer: delete the Github repository that hosts the application to be deployed - and start from crach