update_automation: stick to remote master branch
update_automation: stick to remote master branch

ignore local changes (they should use a copy of the repo)
and consistently checkout the latest remote master

aspiers/automation,vmoravec/automation,vmoravec/automation,vmoravec/automation,SUSE-Cloud/automation,SUSE-Cloud/automation,gosipyan/automation,vmoravec/automation,aspiers/automation,SUSE-Cloud/automation,aspiers/automation,SUSE-Cloud/automation,gosipyan/automation,aspiers/automation,gosipyan/automation,gosipyan/automation