git - How to undelete a branch on github?

Question

It seems that I delete a branch on github when I should not do it.

What I did was as follow:

1- I add a new .gitignore to my system

2- I use

 git rm -r --cached .  
 git add .  
 git commit -m ".gitignore is now working"  

When I did this, I had one branch on my local system but the server had two branch.

Then I pushed my branches to server and since I had not the second branch, the second branch was deleted on server.

How can I bring it back?

I am using Github as remote server.

Answer 1

If you know the last commit message of the deleted branch you can do this:

git reflog

# search for message

fd0e4da HEAD@{14}: commit: This is the commit message I want

# checkout revision

git checkout fd0e4da 

or

git checkout HEAD@{14}

# create branch

git branch my-recovered-branch

# push branch

git push origin my-recovered-branch:my-recovered-branch