Turns out that the sync job was broken (which I hot-patched via git-for-windows/git-sdk-64@0dad151), and that hid a plethora of other problems:

• ci-artifacts is broken (cannot find Tcl's init.tcl when trying to generate the translations, which most likely means that gettext is no longer working correctly)
• git-artifacts is broken, too, which is most likely yet another fall-out of ps/meson.

I've finally managed to get the PR build to pass.

However, I am quite impressed with the amount of challenges we're facing this late in the release cycle, and due to the interesting timing that overlaps with so many contributors' holidays I am doubtful that -rc0 and -rc1 have seen remotely sufficient testing, so I've decided to give this some extra time to test manually, tomorrow.

Yes, this will delay Git for Windows v2.48.0-rc2, and the final Git for Windows v2.48.0, too.