As a JIRA user that also is an JIRA-integrated SCM user of some sort (Bitbucket in my example), I click the Create Branch link and get put into Bitbucket with an auto-created banch name of:
...consisting of the Issue Key + a length-limited "Train-Case" part of the Summary, we would like the flexibility to have it just be:
It would be helpful to have a limited "printf" format model where key bits of the issue were available for customization into the branch name. In our case, we just want the Issue Key.
Prototype: Where these (and other) format strings are possible with built-in definitions:
%s = Summary %k = Issue Key %K = Issue Key All Caps %f = Fix Version %a = Assignee
...etc. then the JIRA Administrator would be able to automate the branch name format in a way that makes the Create Branch link more usable and prevents some naming errors.