We use Jenkins to deploy project by building from the latest tag. To do so without a need to manually specify latest tag we use
Refspec: +refs/tags/prod/:refs/remotes/origin/tags/prod/
Branch specifier: /tags/prod/

This works fine except for first time after git configuration fro project was changed, as it will try to build all unseen branches (in this case tags). It would be useful to have an option to build only latest tag or branch that matches ref spec and specifier. Or to be able to set branch specifier to executable script, for example

git describe --tags `git rev-list --tags --max-count=1`