Re: branch --set-upstream-to unexpectedly fails with "starting point ... is no branch"

> Hello Mark,
>
> On 23 Nov 2015, at 12:04, Marc Strapetz <marc.strapetz@syntevo.com> wrote:
>
>> There is a strange "branch --set-upstream-to" failure for "clones" which haven't been created using "git clone" but constructed using "git init", "git remote add" and "git fetch".
>>
>> Following script first creates a "main" repository and then constructs the clone. Finally, in the clone branches origin/1 and origin/2 will be present, however it's not possible to invoke "git branch --set-upstream-to" for origin/2 (it works fine for origin/1).
>>
>> I guess the behavior is related to following line in .git/config:
>>
>> fetch = refs/heads/1:refs/remotes/origin/1
>>
>> However, I don't understand what's the problem for Git here? Definitely the error "starting point 'origin/2' is not a branch" is wrong.
>>
>
> That is indeed the issue. The configuration which is stored in the configuration is a remote+branch pair. If there is no fetch refspec configured which would create the ‘origin/2’ remote-tracking branch, the command does not know which remote and branch that would correspond to.