Link to branch builds returns 404 for branch with dot

How to Use GitLab
1

I am using gitlab CE (8.3.3) with ci enabled.

I can display the CI status badge with a link to the build for master with

[![build status](http://git.company.tld/ci/projects/4/status.png?ref=master)](http://git.company.tld/namespace/project/commit/master/builds)

The link show a summary page with all builds related to the current head of branch master

However if I want to the same for branch 1.0.1 the status badge works but the link does not and returns an 404 error code.

[![build status](http://git.company.tld/ci/projects/4/status.png?ref=1.0.1)](http://git.company.tld/namespace/project/commit/1.0.1/builds)

I already tried replacing the dot with %2E or placing the branch name in quotes and double quotes but nothing helped.

Can anybody tell me how I need to format my url?