I haven’t built from scratch (clean) in a while, so apologies if this was mentioned elsewhere (didn’t see it in a quick search).
It looks like as of Nov 2, the “brownout” of the git:// protocol is beginning. Cloning of DCMTK using this protocol during the build fails, but the solution is just to un-check Slicer_USE_GIT_PROTOCOL in CMake. Should this be the default now, as git:// protocol is truly going away?
Yes - I was able to build. @jcfr committed a fix for the unknown architecture problem; setting Slicer_USE_GIT_PROTOCOL=OFF fixed the git protocol issue with DCMTK (and possibly other packages using git:// protocol.