$ git clone -b master --recursive --depth 1 --progress https://github.com/ScarletKuro/NadekoBot.git
Cloning into 'NadekoBot'...
remote: Counting objects: 506, done.
remote: Compressing objects: 100% (420/420), done.
remote: Total 506 (delta 127), reused 268 (delta 76), pack-reused 0
Receiving objects: 100% (506/506), 3.84 MiB | 729.00 KiB/s, done.
Resolving deltas: 100% (127/127), done.
Checking connectivity... done.
Submodule 'Discord.Net' (https://github.com/Kwoth/Discord.Net) registered for path 'Discord.Net'
Cloning into 'Discord.Net'...
remote: Repository not found.
fatal: repository 'https://github.com/Kwoth/Discord.Net/' not found
fatal: clone of 'https://github.com/Kwoth/Discord.Net' into submodule path 'Discord.Net' failed