$ git clone -n https://src.fedoraproject.org/rpms/llvm16.git /var/lib/mock/f41-build-side-1-2812345-32939/root/chroot_tmpdir/scmroot/llvm16
Cloning into '/var/lib/mock/f41-build-side-1-2812345-32939/root/chroot_tmpdir/scmroot/llvm16'...
$ git fetch origin 7f0a15a0857bd79bf243d50191e9f70a3f71ad16:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/llvm16
 * [new ref]         7f0a15a0857bd79bf243d50191e9f70a3f71ad16 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7f0a15a This package is not supported anymore