Q: Where can I get the current source code for SUSE SLES products? I'm having a critical support issue with SLES that doesn't make any measurable progress (for months now).
So I wanted to have a look at the source code myself; maybe I can spot the issue.
(It seems a fatal bug was added between SLES15 SP2 and SP3 in the Xen Hypervisor that causes frequent server crashes due to RAM corruption)
As I see it you can download DVD images that should contain the source code, but those are as old as the media are.
Meaning: You don't have the source for the current patches.
Isn't there a public Git repository where I could inspect the changes being made from release to release or from patch to patch?
I don't want to download ISO images, unpack them, download more RPM source packages and unpack them, etc. just to see the changes.
I see that the business model is somewhat against that, but from a support perspective that is vital.

A: All the GPL requires is that they make the source code available.  (And not everything Linux is GPL.)  They don't have to make it available in any convenient format.  I'm guessing their internal revision control servers are private for reasons of their business model.  Downloading SRPMs is likely your best bet.
Try something like zypper si foo or dnf download --source foo to get the source packages for the component(s) you are interested in.
