[Koha] Upgrading using apt-get

After some tests for migrating from Koha 3.2.7, I'm going to start using Koha 3.12.5 in a production environment, on Debian. In the meanwhile Koha had two patches (3.12.6, 3.12.7) and one release (3.14). Will my next apt-get upgrade Koha to 3.12.7? Or to Koha 3.14, if its deb package becomes available? If to Koha 3.12.7, how can I upgrade to Koha 3.14 when my library will be ready to move? Thanks. Stefano