System information

• node version:10.11.0
• npm or yarn version: yarn 1.13.0
• OS/version/architecture: MAC Mojave
• Applicable nodegit version:0.23.0-alpha.1

simulate git remote prune origin

After running node-git for 2+ years, now we see issues with few repos related to unused refs. This is causing issue as below

cannot lock ref 'refs/remotes/origin/release', there are refs beneath that folder

Issue is caused by loose refs which needs to be prune.
When I manually run following followed by git fetch --prune then it works

git remote prune origin

However trying to similar using node-git is not working. Following is code to prune using node-git

  async pruneAndFetch() {
    // const remote = await repo.getRemote("origin");  This also didn't work
    const remote = await git.Remote.lookup(repo,'origin');
    await remote.prune(new git.RemoteCallbacks()); 
    await remote.pruneRefs(); // This also didn't help
 
   // Now fetch
    await this._repo.fetchAll({
      callbacks: globalFetchCallbacks,
      downloadTags: git.Remote.AUTOTAG_OPTION.DOWNLOAD_TAGS_ALL,
      prune: git.Fetch.PRUNE.GIT_FETCH_PRUNE,
    });
  }

Note: prune step doesn't throw any error, it pass but don't see it really does anything
Any help to simulate git remote prune origin will be appreciated.