[BUG] could not get correct branch name from longhorn/spdk

[a110605]

Describe the bug

Longhorn branch could not be found when apply longhorn-spdk-setup yaml.

To Reproduce

Follow prerequisites docs, applying longhorn-spdk-setup yaml should git clone correct setup script from https://github.com/longhorn/spdk/tree/longhorn-1.6.

kubectl apply -f https://raw.githubusercontent.com/longhorn/longhorn/v1.6.1/deploy/prerequisite/longhorn-spdk-setup.yaml

But got

fatal: Remote branch longhorn not found in upstream origin. Failed to configure SPDK environment error code 1

Expected behavior

Should git clone script from spdk repo without any problem.

Support bundle for troubleshooting

Environment

• Longhorn version: 1.6.1
• Installation method (e.g. Rancher Catalog App/Helm/Kubectl): Kubectl
• Kubernetes distro (e.g. RKE/K3s/EKS/OpenShift) and version: K3s
  • Number of control plane nodes in the cluster: 1
  • Number of worker nodes in the cluster: 1
• Underlying Infrastructure (e.g. on AWS/GCE, EKS/GKE, VMWare/KVM, Baremetal): digital ocean
• Number of Longhorn volumes in the cluster: 0

Additional context