请参考官方的git-completion
https://github.com/git/git/blob/master/contrib/completion/git-completion.bash
下面的东西就当我放了个屁！！！
参考：https://blog.csdn.net/qianggezhishen/article/details/50585512
一、下载git自动补齐脚本到家目录
root@zabbix:~# curl https://raw.githubusercontent.com/git/git/master/contrib/completion/git-completion.bash -o ~/.git-completion.bash
二、编辑bashrc文件，每次开启bash都加载此脚本
root@zabbix:~# vim ~/.bashrc
root@zabbix:~# tail -3 ~/.bashrc
if [ -f ~/.git-completion.bash ]; then
. ~/.git-completion.bash
fi
root@zabbix:~# 
三、执行source命令，让bashrc在当前终端生效
root@zabbix:~# source ~/.bashrc