Field configuration in Bitbucket Server + Jira Server integration

[Filip Pokorny]

We've got bitbucket server integrated with Jira server v7.6.1 already and that works fine. Is it possible to have more fields in the jira preview inside bitbucket? I'd like to have a fix Version/s added. The problem is I don't have the access to a server configuration and IT won't help me unless I've got the evidence that it's possible. (yeah I know, funny, isn't it). 

Thank you