Source clone secrets are used to provide the builder Pod with access it would not normally have access to, such as private repositories or repositories with self-signed or untrusted SSL certificates. We should add sourceSecret field into SourceRepositorySpec API in order to allow users to manually add a clone secret to their setup. See https://docs.openshift.com/container-platform/4.4/builds/creating-build-inputs.html#builds-adding-source-clone-secrets_creating-build-inputs for more details on the source secret functionality.

Users could use the source-secret-match-uri method to link sourceSecret automatically, but I think we should allow them to use sourceSecret as well to provide support both options how to solve this.