Oc-mirror for OCI FBC catalogs without package filter will failed 

oc-mirror version 
Client Version: version.Info{Major:"", Minor:"", GitVersion:"4.13.0-202303071354.p0.g2f6f843.assembly.stream-2f6f843", GitCommit:"2f6f843f311e8440eb7901433e0f0a8419c96487", GitTreeState:"clean", BuildDate:"2023-03-07T21:12:06Z", GoVersion:"go1.19.4", Compiler:"gc", Platform:"linux/amd64"}

always

1)  Create imagesetconfigure like 
cat config.yaml 
apiVersion: mirror.openshift.io/v1alpha2
kind: ImageSetConfiguration
storageConfig:
  registry:
    imageURL: localhost:5000/metadata:latest
    skipTLS: true
mirror:
  operators:
    - catalog: oci:///home/ocmirrortest/noo/redhat-operator-index

2)  Run the oc-mirror command without filter the package 
`oc-mirror --config config.yaml  docker://localhost:5000  --use-oci-feature --dest-use-http --dest-skip-tls --dry-run`

The oc-mirror failed with error:
[root@localhost 60660]# oc-mirror --config config.yaml  docker://localhost:5000  --use-oci-feature --dest-use-http --dest-skip-tls --dry-run 
Checking push permissions for localhost:5000
Found: oc-mirror-workspace/src/publish
Found: oc-mirror-workspace/src/v2
Found: oc-mirror-workspace/src/charts
Found: oc-mirror-workspace/src/release-signatures
No metadata detected, creating new workspace
unable to create ImageSource for more than one image in oci, choose an image: oci:///home/ocmirrortest/noo/redhat-operator-indexerror: unable to get OCI Image from oci:/home/ocmirrortest/noo/redhat-operator-index: more than one image in oci, choose an image
[root@localhost 60660]# echo $?
1

.

The error  information seems like we can't support the head only for OCI FBC , better to update it .