Recursive clone fails for util-common-m4 submodule

It seems that the submodule for m4 is no longer available (publicly?). Is there any workaround?

git clone --recursive https://gitlab.freedesktop.org/xorg/lib/libxcb-render-util.git
Cloning into 'libxcb-render-util'...
remote: Enumerating objects: 1448, done.
remote: Counting objects: 100% (33/33), done.
remote: Compressing objects: 100% (19/19), done.
remote: Total 1448 (delta 16), reused 28 (delta 14), pack-reused 1415 (from 1)
Receiving objects: 100% (1448/1448), 294.29 KiB | 724.00 KiB/s, done.
Resolving deltas: 100% (1010/1010), done.
Submodule 'm4' (git://anongit.freedesktop.org/xcb/util-common-m4.git) registered for path 'm4'
Cloning into '/home/tmp/libxcb-render-util/m4'...
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.
fatal: clone of 'git://anongit.freedesktop.org/xcb/util-common-m4.git' into submodule path '/home/tmp/libxcb-render-util/m4' failed
Failed to clone 'm4'. Retry scheduled
Cloning into '/home/tmp/libxcb-render-util/m4'...
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.
fatal: clone of 'git://anongit.freedesktop.org/xcb/util-common-m4.git' into submodule path '/home/tmp/libxcb-render-util/m4' failed
Failed to clone 'm4' a second time, aborting