git clone behind proxy [socks4 error]

 The error would look like:

Cloning into '/home/amov/PX4-Autopilot/boards/modalai/voxl2/libfc-sensor-api'...
fatal: unable to access 'https://gitlab.com/voxl-public/voxl-sdk/core-libs/libfc-sensor-api.git/': SOCKS4 connection to 2606:4700:90:0:f22e:fbec:5bed:a9b9 not supported

Try

$ echo $http_proxy
http://127.0.0.1:7890/

Configure git for proxy

$ git config --global http.proxy sockes5://127.0.0.1:7890
$ git config --global https.proxy sockes5://127.0.0.1:7890

If password is used

git config --global http.proxy socks5://username:password@proxyserver:port
git config --global https.proxy socks5://username:password@proxyserver:port

Now cd into the directory and retry

git submodule update --init --recursive