TeamCity, Git Agent Checkout does not pull new tags?

Hallo

we use the VCS labelling feature to add a Git Tag for a release build. The repository contains a set of tests (selenium ui tests) that are used to run to verify a deployment.

So what we had in mind was: 

1. checkout the git repo
2. check what version is deployed on an environment
3. switch to the tag with that version
4. execute the tests

step 1 and 2 work. We have trouble with step 3. On initial clone the existing tags appear. But after that any new tag is not visible anymore in the build.

We have added "+:refs/tags/*" in the branch specification and enabled the option "Enable to use tags in the branch specification" but that does not help. That only allows to select the tag in the "run..." menu manually. And actually we don't want a new tag to be build - just to be able to switch to a tag after git clone or git fetch.

But for some reason the fetch only updates the master branch, not new tags.

Is there some option hidden somewhere to tell the TeamCity agent to fetch everything not only the master (or default) branch?

Thanks!