This post will guide you through step-by-step instruction to install git on Mac system

Installing GIT on Mac

1. Install Install Java on Mac using brew is a simple process. You need to have brew installed on your system as a pre-requisite. You can install brew from here

2. Install git as

   brew install git
   

3. Verfiy git installation

   Pavans-MacBook-Pro:pavanpkulkarni.com pavanpkulkarni$ git version
   git version 2.15.1
   

Here are some git basic commands:

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Clone a specific branch:
---------------------------------
git clone -b pavan 


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sync local branch with master:
---------------------------------
git checkout master
git pull
git checkout pavan
git merge master


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merge local_branch to master
------------------------------
git checkout -f master
git merge local_branch
git push origin master


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uncommit
----------
git reset --hard HEAD~1 -> one commit removed

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update fork
------------
git remote add upstream https://github.com/<username>/repo.git
git fetch upstream
git checkout master
git merge upstream/master


-------
stash
-------
git stash
git stash pop



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Add SSH Key to you Git Profile
-------------------------------

1. Generate a new SSH key for you system
ssh-keygen -t rsa -b 4096
pbcopy < ~/.ssh/id_rsa.pub

2. Add ssh public key to SSH in git console (Settings -> SSH and PGP Keys -> Select New SSH Key)

3. New clone (not required if already cloned)
git clone git@github.com:pavanpkulkarni/repo.git

4. upstream
git remote add upstream git@github.com:pavanpkulkarni/repo.git


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Set remote URL
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1. git remote set-url origin git@github.com:username/repo.git
2. git remote set-url upstream git@github.com:username/repo.git
3. git remote -v 
origin git@github.com:username/repo.git (fetch)
origin git@github.com:username/repo.git (push)
upstream git@github.com:username/repo.git (fetch)
upstream git@github.com:username/repo.git (push)


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word wrap for diff
-------------------
GIT_PAGER='' git diff


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Delete Remote Branch
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git push origin --delete <branch_name>


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Delete Local Branch 
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git branch -D <branch_name>


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Force Push to Remote Branch 
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git push --force origin branch_name:master


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add remote branch 
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git fetch origin
git checkout --track origin/<remote_branch_name>

References:

1. https://en.wikipedia.org/wiki/GitHub
2. https://guides.github.com/