The Yocto Project Website uses a "DOWNLOADS" page from which you can locate and download tarballs of any Yocto Project release. Rather than Git repositories, these files represent snapshot tarballs.
Go to the Yocto Project Website: Open The Yocto Project Website in your browser.
Get to the Downloads Area: Select the "DOWNLOADS" item from the pull-down "SOFTWARE" tab menu.
Select a Yocto Project Release: Use the menu next to "RELEASE" to display and choose a Yocto Project release (e.g. sumo, rocko, pyro, and so forth. For a "map" of Yocto Project releases to version numbers, see the Releases wiki page.
Download Tools or Board Support Packages (BSPs): From the "DOWNLOADS" page, you can download tools or BSPs as well. Just scroll down the page and look for what you need.