git 补全

# 不复制历史版本
git clone --depth=1 https://github.com/git/git
find ./git -name '*completion*'
#./git/t/t9902-completion.sh
#./git/Documentation/config/completion.txt
#./git/contrib/completion
#./git/contrib/completion/git-completion.tcsh
#./git/contrib/completion/git-completion.zsh
#./git/contrib/completion/git-completion.bash
cp ./git/contrib/completion/git-completion.bash  ~
echo -e '
source  ~/git-completion.bash 
' >>  ~/.bashrc 
source ~/.bashrc