Yes, finally I used "String parameter" but that was, what I was trying to avoid... I wanted to help anyone selecting their branch and not typing it.
Thank you for your support :) -- You received this message because you are subscribed to the Google Groups "Jenkins Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to jenkinsci-users+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/jenkinsci-users/5aad998d-c8d8-455e-9a30-a82e8f7cbbbd%40googlegroups.com.