repo.branches.each do |x|
      if x.name == repo_branch_to_delete
        x.delete
      end
    end

repo.push 'origin'
Traceback (most recent call last):
        2: from (irb):124
        1: from (irb):125:in `rescue in irb_binding'
Git::FailedError (git '--git-dir=/***/repos/431/.git' '--work-tree=/***/repos/431' '-c' 'core.quotePath=true' '-c' 'color.ui=false' 'push' 'origin'  2>&1)
status: pid 42218 exit 128
output: "fatal: The current branch bot_431 has no upstream branch.\nTo push the current branch and set the remote as upstream, use\n\n    git push --set-upstream origin bot_431\n\nTo have this happen automatically for branches without a tracking\nupstream, see 'push.autoSetupRemote' in 'git help config'.\n\n"