bdisk/docs/manual/faq/GETVERSION.adoc

How do I get the version/build of an ISO?

This can be found in a multitude of places. The full-size ISO file (iso/<distname>-<git tag>-<git rev number>-(32|64|any).iso) should have the version right in the filename. If you want more detailed information (or perhaps you renamed the file), you can mount the ISO as loopback in GNU/Linux, *BSD, or Mac OS X/macOS and check /path/to/mounted/iso/VERSION_INTO.txt. Lastly, within the runtime itself (especially handy if booting via iPXE), you can check /root/VERSION_INFO.txt to get information about the build of the currently running live environment.