Thanks for your reply. I just started the zip-download (master) from the mirror.
30min ago I did
git config --global core.compression 0
git clone --depth 1 git://git.code.sf.net/p/ufoai/code ufoai_complete
It's at 15% now and looking good so far.
If it completes I will continue with
git fetch --unshallow
git pull --all
Maybe this workes for the whole repository for me.
hoiba
###Edit###
Failed at 20% with same error
Github Zip-Download completed
###Edit 2###
git clone --progress git://github.com/ufoai/ufoai.git ufoai-mirr
finished and completed sometimes last night