$ git clone -n https://src.fedoraproject.org/rpms/llvm6.0.git /var/lib/mock/f33-build-218254-48451/root/chroot_tmpdir/scmroot/llvm6.0
Cloning into '/var/lib/mock/f33-build-218254-48451/root/chroot_tmpdir/scmroot/llvm6.0'...
error: RPC failed; HTTP 404 curl 22 The requested URL returned error: 404
fatal: the remote end hung up unexpectedly