如何在GIT中提取另一个存储库并更新到它的头部？

Question

Here is the description of the problem in terms of Mercurial:

Given:

• Two repos A and B , where B is a fork of A
• The current directory is a working directory for the tip of A .

Needed:

• Pull in B and update to its most recent head REV .

This is what I want to do in term of Mercurial:

A> hg pull B
A> hg heads         # Notice the most recent head of B
A> hg update **REV**

How can I do it in GIT? More concretely:

• A is the master branch of https://github.com/yui/yui3-gallery.git
• B is the master branch of https://github.com/jafl/yui3-gallery.git
• I need to update to the most recent revision of B , when I have a local clone of A

I know it should be trivial, still I cannot figure it out.

Anyone?

Answer 1

git remote add other_repo
git fetch
git merge other_repo/branch

Answer 2

git remote add a_repo a_repo_url
git fetch a_repo
git merge a_repo/branch