you will need the source revision override

input transformer

{"commitId": "$.detail.commitId"}

{
    "sourceRevisions": {
        "actionName": "Source",
        "revisionType": "COMMIT_ID",
        "revisionValue": "<commitId>"
    }
}

for details please check following document

https://docs.aws.amazon.com/codepipeline/latest/userguide/pipelines-trigger-source-repo-changes-console.html

https://docs.aws.amazon.com/codepipeline/latest/userguide/pipelines-trigger-source-overrides.html#pipelines-trigger-source-overrides-cli