I order to initialize a git repository you have to perform the following steps:

1. $ cd /path/to/project
2. $ git init
3. $ git remote add origin https://xxxxx.com/repo
4. $ git add .
5. $ git commit -m ‘initial commit’
6. $ git push origin master

To synchronize local project (development version) with git you have to perform the following steps:

1. cd /path/to/project
2. git add ./*
3. git commit -m “commit message”
4. git push origin master

The simplest guide to use git projects and repositories is published here!