Description

Provide a way to replace (vs. append) attestations.

Currently the same attestation type can be appended multiple times. A proposal is to support a --replace which would change the behavior to replace an attestation of the same type instead of appending it to the existing list of attestations.

Slack discussion at: https://sigstore.slack.com/archives/C01PZKDL4DP/p1633463916305100.