This happens when I try to clone git://git.openclonk.org/openclonk.git using TortoiseGit:

git.exe clone      --progress -v  "git://git.openclonk.org/openclonk.git" "C:\Users\Jan\Desktop\openclonk"

Cloning into 'C:\Users\Jan\Desktop\openclonk'...
fatal: early EOF
remote: aborting due to possible repository corruption on the remote side.
fatal: index-pack failed

git did not exit cleanly (exit code 128) (13775 ms @ 31.01.2014 23:47:00)