so, with `.fdo:distribution-image@fedora` I got an error:
```
WARNING: Failed to pull image with policy "if-not-present": invalid reference format (manager.go:250:0s)
ERROR: Job failed: failed to pull image "registry.freedesktop.org/cangjie/libcangjie/fedora/:" with specified policies [if-not-present]: invalid reference format (manager.go:250:0s)
```