Here is how to do a roll back.
First you need permission to edit the branch history
Then you need to check out to the master branch inside the command line.
Pick a git commit id that you want to revert back to, it will look something like this: 0208adb
Type this command git reset --hard 0208adb
Then you need to push this commit into master. git push -f -u origin
Alternatively you can just go to the Pipelines and start one in the past in the past on the master branch that you would like to, and that will reset the environment as well, but not fuck up the code.