Unable to access sso enabled github repository

[arungskumar]

Hi,
When trying to access a github repository, where sso is enabled on its organization and authorized ssh key, we notice below error in the concourse resource

  run check step: run check step: check: resource script '/opt/resource/check []' failed: exit status 128
  
  stderr:
  Identity added: /tmp/git-resource-private-key (USER_NAME@MACHINE)
  Cloning into '/tmp/git-resource-repo-cache'...
  warning: Could not find remote branch master to clone.
  fatal: Remote branch master not found in upstream origin

Also, when tried locally able to connect and access the same repository. Here is the resource config from the pipeline,

 name: REPOSITORY_NAME
 type: git
 source:
   uri: git@github.com:ORG_NAME/REPO_NAME.git
   private_key: |
     -----BEGIN OPENSSH PRIVATE KEY-----
     b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAABFwAAAAdzc2gtcn
     <MORE TEXT>
      mZ/ffjs/Nib8GDkAAAAWYXI1Zjl5ZkBMLVBUTjlZQkpHNUotTQECAwQF
     -----END OPENSSH PRIVATE KEY-----

Could you please help me out in getting this issue fixed.
Thanks.

Regards,
Arun

[kvmw]

@arungskumar have you tried using RSA algorithm to generate the key instead of Ed25519 ?