git - difference between origin/branch_name and branch_name?

Question

for pushing to bitbucket.

If I do: git push origin origin/branch_name my commits are not pushed.

Total 0 (delta 0), reused 0 (delta 0)

If I do git push origin branch_name my commits are pushed:

Counting objects: 160, done.
Delta compression using up to 8 threads.
Compressing objects: 100% (13/13), done.
Writing objects: 100% (20/20), 2.10 KiB | 0 bytes/s, done.
Total 20 (delta 6), reused 0 (delta 0)

so what is the origin/ mean in front of the branch_name? And why does it matter?

Answer 1

You have to keep in mind that there are different types of branches:

• (Purely) local branches, i.e. branches you commit to,
• Branches that live in a remote repository, for lack of a better term. You may know the remote repository in question under a remote name, such as origin. From that repository's point of view, though, such a branch is local. Welcome to Distributed Version Control! :)
• Remote-tracking branches. Also simply called remote branches, as in the Pro Git book, but I find this phrase confusing; remote-tracking branch is more accurate. They're special local branches whose sole purpose is to reflect the state of branches that live in a remote repository at the time of your last communication with the server. In particular, you can't commit to branches of this type.

Here, branch_name is a local branch, whereas origin/branch_name is a remote-tracking branch; it reflects the state of the corresponding branch that lives in origin.

Right after running

git fetch

the remote-tracking branch origin/master and the corresponding branch that live in origin should be perfectly in sync (modulo concurrent pushes to the remote server, of course). It shouldn't be a surprise, then, that

git push origin origin/branch_name

doesn't push anything: you're essentially attempting to push stuff that is already present in the ancestry of the corresponding branch that live in origin .

However, if your local branch, branch_name, is ahead by one or more commits,

then running

git push origin branch_name

will push the commits contained in branch_name but not in the branch that live in origin: