git.md

 # **git** cheat sheet
+## Only the first time
 * install [**```git```**](https://git-scm.com/download/)
 * set email adress: ```git config --global user.email "meep@meep.com"``` (has to be the email you used in *github.com*)
 * set name: ```git config --global user.name "meep meep"```
-* **clone** the repo: ```git clone https://github.com/tbphu/Python_precourse.git```
+* **clone** the repo: ```git clone https://github.com/*your_name*/Python_course.git```
+* set **upstream**: ```git remote add upstream https://github.com/tbphu/Python_course.git```
+
+## Daily work with git
 * **pull** repo: ```git pull```
 * **commit**: ```git commit -m "I have done this and that" ./meep.py```
 * **push** commits: ```git push```    
@@ -11,5 +15,4 @@
 * **delete uncommited** changes: ```git checkout .```    
 * **update forked** repo:     
    ```git fetch upstream```    
-   ```git checkout master```    
    ```git merge upstream/master```
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