Attestations for
  ghcr.io/boks-sh/which@sha256:39fc7f5a9e5e53aee9c84422239b848be72405f37c791143ac1e73e043d517c5

Verify them yourself:
  cosign verify-attestation --key cosign.pub \
      --type <cyclonedx|slsaprovenance> ghcr.io/boks-sh/which@sha256:39fc7f5a9e5e53aee9c84422239b848be72405f37c791143ac1e73e043d517c5

=== cyclonedx ===================================================
  (no attestation matches the document published now -- 0 older one(s) are attached)

=== slsaprovenance ==============================================
  (no attestation matches the document published now -- 0 older one(s) are attached)