A GNOME OS install image is not available for this release due but you can get a Nightly image from os.gnome.org which is a close approximation of the alpha release.
WARNING!
This release is a snapshot of development code. Although it is buildable and usable, it is primarily intended for testing and hacking purposes.
For more information about the 45 release, the full schedule, the official module lists and the proposed module lists, please see our wiki page:
@alatiera Thanx for the heads up. I see that there are updates to modules. Is it possible https://l10n.gnome.org to be updated with a release targetting the 45th edition?