A tutorial explaining the process of updating from Fedora 38 Workstation to Fedora 39 was released by DebugPoint.

Upgrade to Fedora 39 from Fedora 38 Workstation (GUI and CLI)

A complete guide on how to upgrade to Fedora 39 from Fedora 38 with both GUI and CLI methods + pre-upgrade steps. Fedora 39 is officially available for download after a significant delay due to major blocker bugs. This release brings stunning GNOME 45 desktop for workstation editions, KDE Plasma 5.27 (the last Plasma five series) and more. You can read my feature guide for Fedora 39 on this page. If you’re trying to upgrade to Fedora 39 from Fedora 38, here are the recommended steps you should follow.

Upgrade to Fedora 39 from Fedora 38 Workstation (GUI and CLI)