Duplicate header: "Authorization"

[petlitskiy]

Faced when using actions/checkout@main:

  /usr/bin/git remote prune origin
  remote: Duplicate header: "Authorization"
  fatal: unable to access 'https://github.com/***/****/': The requested URL returned error: 400
  Error: The process '/usr/bin/git' failed with exit code 128

[ericsciple]

@petlitskiy are you using a self-hosted runner or a hosted runner?

[ericsciple]

@petlitskiy or do you have multiple checkout steps for the same job?