steps required to bring fork of rufus-scheduler in sync again after branch renaming

gistfile1.txt

#
# Steps I took to re-sync my fork of rufus-scheduler to the
# new branches on jmettraux/rufus-scheduler after the following renames:
#
#  master  -> onezero
#  twozero -> master
#

$ git clone git@github.com:kjwierenga/rufus-scheduler.git # fresh clone of my fork
$ cd rufus-scheduler
(master) $ git remote add upstream git://github.com/jmettraux/rufus-scheduler.git
(master) $ git remote update
(master) $ git branch -a
* master
  origin/HEAD
  origin/master    # should be rename to onezero
  origin/twozero   # should be renamed to master
  upstream/master  # the new master (used to be twozero)
  upstream/onezero # the onezero branch (used to be master)

(master) $ git checkout -b twozero origin/twozero # get the old twozero branch
Branch twozero set up to track remote branch refs/remotes/origin/twozero.
Switched to a new branch "twozero"
(twozero) $ git branch -m master old_master # move old master out of the way
(twozero) $ git branch -m twozero master    # rename twozero to master
master) $ git branch -a
* master
  old_master
  origin/HEAD
  origin/master
  origin/twozero
  upstream/master
  upstream/onezero
(master) $ git branch -m old_master onezero # rename old_master to onezero
(master) $ git branch -a
* master
  onezero
  origin/HEAD
  origin/master
  origin/twozero
  upstream/master
  upstream/onezero

(master) $ git push origin :master # remove old master
To git@github.com:kjwierenga/rufus-scheduler.git
 - [deleted]         master

(master) $ git push origin master:refs/heads/master # push the new master to my fork
error: refs/remotes/origin/HEAD points nowhere!
Total 0 (delta 0), reused 0 (delta 0)
To git@github.com:kjwierenga/rufus-scheduler.git
 * [new branch]      master -> master

(master) $ git push origin :twozero # remove old twozero
To git@github.com:kjwierenga/rufus-scheduler.git
 - [deleted]         twozero

master) $ git push origin onezero:refs/heads/onezero # push new onezero to my fork
Counting objects: 58, done.
Compressing objects: 100% (25/25), done.
Writing objects: 100% (43/43), 12.68 KiB, done.
Total 43 (delta 23), reused 36 (delta 17)
To git@github.com:kjwierenga/rufus-scheduler.git
 * [new branch]      onezero -> onezero

(master) $ git branch -a
* master
  onezero
  origin/HEAD
  origin/master
  origin/onezero
  upstream/master
  upstream/onezero

# now structure of my fork is same as upstream