Renovate can't push git refs if tags match branch names

[rarkins]

How are you running Renovate?

WhiteSource Renovate hosted app on github.com

If you're self-hosting Renovate, tell us what version of Renovate you run.

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Please select which platform you are using if self-hosting.

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If you're self-hosting Renovate, tell us what version of the platform you run.

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Describe the bug

If a repo uses Renovate branch names as tags, Renovate's git push fails.

Related Stack Overflow: https://stackoverflow.com/questions/9378760/git-push-local-branch-with-same-name-as-remote-tag

Relevant debug logs

Logs

{
  "hostname": "ip-172-31-3-139",
  "level": 40,
  "logContext": 509891797,
  "repository": "donmahallem/js-libs",
  "branch": "renovate/typescript-4.x",
  "err": {
    "task": {
      "commands": [
        "push",
        "origin",
        "renovate/typescript-4.x:renovate/typescript-4.x",
        "--force-with-lease",
        "-u",
        "--no-verify",
        "--verbose",
        "--porcelain"
      ],
      "format": "utf-8"
    },
    "message": "Pushing to https://github.com/donmahallem/js-libs.git\nerror: src refspec refs/heads/renovate/typescript-4.x matches more than one\nfatal: the remote end hung up unexpectedly\nerror: failed to push some refs to 'https://github.com/donmahallem/js-libs.git'\n",
    "stack": "Error: Pushing to https://github.com/donmahallem/js-libs.git\nerror: src refspec refs/heads/renovate/typescript-4.x matches more than one\nfatal: the remote end hung up unexpectedly\nerror: failed to push some refs to 'https://github.com/donmahallem/js-libs.git'\n\n at Object.action (/home/ubuntu/renovateapp/node_modules/simple-git/src/lib/plugins/error-detection.plugin.js:30:33)\n at PluginStore.exec (/home/ubuntu/renovateapp/node_modules/simple-git/src/lib/plugins/plugin-store.js:21:33)\n at /home/ubuntu/renovateapp/node_modules/simple-git/src/lib/runners/git-executor-chain.js:95:45\n at new Promise (<anonymous>)\n at GitExecutorChain.handleTaskData (/home/ubuntu/renovateapp/node_modules/simple-git/src/lib/runners/git-executor-chain.js:93:16)\n at GitExecutorChain.<anonymous> (/home/ubuntu/renovateapp/node_modules/simple-git/src/lib/runners/git-executor-chain.js:77:46)\n at Generator.next (<anonymous>)\n at fulfilled (/home/ubuntu/renovateapp/node_modules/simple-git/src/lib/runners/git-executor-chain.js:5:58)\n at runMicrotasks (<anonymous>)\n at processTicksAndRejections (internal/process/task_queues.js:95:5)"
  },
  "msg": "Error updating branch",
  "time": "2021-11-18T08:39:45.861Z"
}

Have you created a minimal reproduction repository?

No reproduction, but I have linked to a public repo where it occurs

[renovate-release]

🎉 This issue has been resolved in version 29.12.7 🎉

The release is available on:

• GitHub release
• 29.12.7

Your semantic-release bot 📦🚀