The buffer into which the name will be written.
The repository where the branch lives.
complete name of the remote tracking branch.
0 on success, GIT_ENOTFOUND when no matching remote was found, GIT_EAMBIGUOUS when the branch maps to several remotes, otherwise an error code.
Find the remote name of a remote-tracking branch
This will return the name of the remote whose fetch refspec is matching the given branch. E.g. given a branch "refs/remotes/test/master", it will extract the "test" part. If refspecs from multiple remotes match, the function will return GIT_EAMBIGUOUS.