BUG: Can't change branch of repo from master to main

[bdombro]

Describe the bug
A clear and concise description of what the bug is.

Link to the blitz that caused the error
https://stackblitz.com/edit/http-server-m8vf6v

To Reproduce
Steps to reproduce the behavior:

1. Go to 'editor'
2. Click on 'repo select'
3. Scroll down to 'main'
4. See that nothing happens

Expected behavior
The selector should change to 'main', and the files should switch to that branch

Version of webcontainer
Hash: 7286dbe8d47d3473cde7be488b7d048fb59b05f2

Screenshots
If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

Browser name  = Chrome 
Full version  = 90.0.4430.212
Major version = 90
navigator.appName = Netscape
navigator.userAgent = Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.212 Safari/537.36
performance.memory = {
  totalJSHeapSize: 62182718,
  usedJSHeapSize: 57563038,
  jsHeapSizeLimit: 4294705152
}

Additional context
Add any other context about the problem here.

[KwintenP]

Hi!

There are some issues with are current Git implementation. This is def a bug.

We'll be releasing a completely reworked version of this in the next week that should resolve this.

[jimbuck]

Hi there, is this still open? Any updates on progress?

[kc0tlh]

@bdombro and @jimbuck, this issue is now resolved! Full writeup in Github issue #2473