git cannot see or show me my remote branch

Question

I have a repo at Gitlab, started in W10. I pushed it.

I cloned it into a Linux OS and started doing things. I created a new branch, call it "mybranch". I pushed it. It's there, in Gitlab.

During these various ops in Linux I also established an SSH key so I wouldn't have to constantly enter my user name and password. This might be relevant... NB back in W10 I don't have to enter the user name + pwd either... but I think I set that up some other way than an SSH key.

I've just gone back to W10 and have gone git pull. git branch -a does not show "mybranch".

So I looked at various similar questions:

I first went git fetch --all. After this:

• git remote update does not solve the problem (shows only "master")

• git pull --all does not solve the problem, I get:

  "Your configuration specifies to merge with the ref 'refs/heads/master' from the remote, but no such ref was fetched."

• git remote show origin gives a response I don't understand:

  "fatal: 'origin' does not appear to be a git repository
  fatal: Could not read from remote repository.
  Please make sure you have the correct access rights and the repository exists."

Then, trying to follow this, I added the following 2 lines to the "config" file of my local git repo:

[remote]    
    fetch = +refs/heads/*:refs/remotes/origin/*

Then I tried the things above again and got exactly the same answers. git branch -a only ever shows "master".

Possibly I need to edit the "config" file in my Gitlab (remote) repo rather than the local one. But I couldn't find it in Gitlab.

So I'm floundering. Maybe I've configured something badly! I have no idea.

Attempt to clone

Interesting. I find I can't clone either in W10 (i.e. in a fresh directory):

...>git clone git@gitlab.com:mikerodent/myproject.git
Cloning into 'myproject'...
The authenticity of host 'gitlab.com (172.65.251.78)' can't be established.                                             
ED25519 key fingerprint is SHA256:eUX...........
This key is not known by any other names
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added 'gitlab.com' (ED25519) to the list of known hosts. 
git@gitlab.com: Permission denied (publickey,keyboard-interactive).
fatal: Could not read from remote repository.
Please make sure you have the correct access rights and the repository exists.

Further actions after suggestions by torek
I deleted the two lines in the file "config"
I added a new SSH key to Gitlab using the procedure which worked in Linux
I made the connection between my machine & the remote:

(myproject) D:\My documents\myproject>git remote set-url origin ssh://git@gitlab.com/mikerodent/myproject
error: No such remote 'origin' # failed
(myproject) D:\My documents\myproject>git remote add origin https://gitlab.com/mikerodent/myproject.git
(myproject) D:\My documents\myproject>git remote set-url origin ssh://git@gitlab.com/mikerodent/myproject # no error reported

NB a curious point is that it wouldn't let me choose a normal W10 path to store my SSH key file: in the end I had to choose the default "/home/mrodent/.ssh" (i.e. Linux-style path). I don't know what this means: I'm using a W10 terminal.

Unfortunately this didn't resolve the issue. However the above did seemingly modify the config file (local repo) as required: I now find it is as follows:

[core]
    repositoryformatversion = 0
    filemode = false
    bare = false
    logallrefupdates = true
    symlinks = false
    ignorecase = true
[branch "master"]
    remote = https://gitlab.com/mikerodent/myproject.git
    merge = refs/heads/master
[remote "origin"]
    url = ssh://git@gitlab.com/mikerodent/myproject
    fetch = +refs/heads/*:refs/remotes/origin/*

Similar fails to previously:

(myproject) D:\My documents\myproject>git fetch --all
Fetching origin
git@gitlab.com: Permission denied (publickey,keyboard-interactive).
fatal: Could not read from remote repository.
Please make sure you have the correct access rights
and the repository exists.
error: Could not fetch origin
(myproject) D:\My documents\myproject>git pull --all
Fetching origin
git@gitlab.com: Permission denied (publickey,keyboard-interactive).
fatal: Could not read from remote repository.
Please make sure you have the correct access rights
and the repository exists.
error: Could not fetch origin
(myproject) D:\My documents\myproject>git remote show origin
git@gitlab.com: Permission denied (publickey,keyboard-interactive).
fatal: Could not read from remote repository.
Please make sure you have the correct access rights
and the repository exists.
(myproject) D:\My documents\myproject>git remote add origin git@gitlab.com:mikerodent/myproject.git
error: remote origin already exists.
(myproject) D:\My documents\myproject>git branch -a
* master  

I note that it says "could not fetch origin" at the same time as saying "remote origin already exists". It appears this may be a permission problem...

If anyone can recommend where I might read up on the issues which might be involved there that'd be good. I have no idea what's going on.

joanis: Output from git remote -v

(myproject) D:\My documents\myproject>git remote -v
origin  ssh://git@gitlab.com/mikerodent/myproject (fetch)
origin  ssh://git@gitlab.com/mikerodent/myproject (push)

Yes, I can clone using git clone https.... All expected branches are there.

Answer 1

git remote show origin gives a response I don't understand:

fatal: 'origin' does not appear to be a git repository

This means you don't have a remote named origin. (Why that is, if you ran git clone, is a bit of a mystery, but you don't show your git clone command so we can't really guess.)

I added the following 2 lines to the "config" file of my local git repo:

[remote]    
    fetch = +refs/heads/*:refs/remotes/origin/*

That isn't quite right as the line above fetch should read:

[remote "origin"]

But there's an easier way to get this line, and the other one you also need, added, using git remote add:

git remote add origin git@gitlab.com:mikerodent/myproject.git

(assuming this is the correct URL; it may not be, based on your other errors). Note that you will probably want to remove the bogus [remote]-with-no-name and subsequent fetch line before using git remote add.

git@gitlab.com: Permission denied (publickey,keyboard-interactive).

This generally means you have the wrong ssh keys set up (either the wrong ones stored on gitlab.com, or the wrong one set in your .ssh/config file locally).