create:

cd ~
mkdir .config
cd .config
git init

vi ~/.config/1_create_links.sh

#!/bin/bash

now=`date "+%Y%m%d-%H%M%S"`

if [ -e ~/.alias -a ! -L ~/.alias ]; then mv ~/.alias ~/.alias-$now; fi 
if [ -e ~/.bashrc -a ! -L ~/.bashrc ]; then mv ~/.bashrc ~/.bashrc-$now; fi 
if [ -e ~/.dir_colors -a ! -L ~/.dir_colors ]; then mv ~/.dir_colors ~/.dir_colors-$now; fi 
if [ -e ~/.inputrc -a ! -L ~/.inputrc ]; then mv ~/.inputrc ~/.inputrc-$now; fi 
if [ -e ~/.vim -a ! -L ~/.vim ]; then mv ~/.vim ~/.vim-$now; fi 
if [ -e ~/.vimrc -a ! -L ~/.vimrc ]; then mv ~/.vimrc ~/.vimrc-$now; fi 
if [ -e ~/.Xdefaults -a ! -L ~/.Xdefaults ]; then mv ~/.Xdefaults ~/.Xdefaults-$now; fi 
if [ -e ~/.zshrc -a ! -L ~/.zshrc ]; then mv ~/.zshrc ~/.zshrc-$now; fi 
if [ -e ~/.ssh/config -a ! -L ~/.ssh/config ]; then mv ~/.ssh/config ~/.ssh/config-$now; fi 

ln -s ~/.config/alias ~/.alias
ln -s ~/.config/bashrc ~/.bashrc
ln -s ~/.config/dir_colors ~/.dir_colors
ln -s ~/.config/inputrc ~/.inputrc
ln -s ~/.config/vim ~/.vim
ln -s ~/.config/vimrc ~/.vimrc
ln -s ~/.config/Xdefaults ~/.Xdefaults
ln -s ~/.config/zshrc ~/.zshrc
ln -s ~/.config/ssh/config ~/.ssh/config

Now you can create the config files.
When you are finished you can go one with commiting the changes, creating a new git repository on the server and push it

cd ~/.config
git add *
git commit

ssh server
mkdir ~/git
cd ~/git
git --bare init config
exit

git remote add origin ssh://servername.example/~/git/config
git push

on a new client you can simply clone the repository from the server and run the script to create the links

git clone ssh://servername.example/~/git/config ~/.config
~/.config/1_create_links.sh

You want to change a file and sync it? On the host where you have done the change:

cd ~/.config
git add *
git commit
git push

On the other hosts:

cd ~/.config
git pull