branch "develop-new" doesn't exist

[Dieterbe]

README says:

The new mono-repo including the desktop app and the web extension is on develop-new branch at the moment. So checkout/track this branch to build the desktop app

However, after getting a fresh clone:

~/c/elevate ❯❯❯ git checkout --track origin/develop-new
fatal: 'origin/develop-new' is not a commit and a branch 'develop-new' cannot be created from it
~/c/elevate ❯❯❯ git branch -a | grep develop                                                       ✘ 128 
* develop
  remotes/origin/HEAD -> origin/develop
  remotes/origin/develop
~/c/elevate ❯❯❯