test-target/renovate.json

{
  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
  "customManagers": [
    {
      "customType": "regex",
      "fileMatch": [
        "helmfile.yaml"
      ],
      "matchStrings": [
        "(?<indentation>\\s*-\\s*)path: git::(?<repoURL>.*)ref=(?<currentValue>.*)"
      ],
      "depNameTemplate": "test-source",
      "datasourceTemplate": "git-refs",
      "packageNameTemplate": "https://gitea.badhouseplants.net/badhouseplants/test-source",
      "versioningTemplate": "loose",
      "replaceString": "{{indentation}}{{commitSHA}}"
    }
  ]
}