Understanding masterless minion and branch configuration..

Salt config

Masterless minion:  
`/etc/salt/minion`:  

```yaml
ext_pillar:
  - git:
    - 2017.12 ssh://gituser@mygitrepo/home/gituser/reponame:
      - root: pillar
      - privkey: /root/.ssh/id_rsa
      - pubkey: /root/.ssh/id_rsa.pub


fileserver_backend:
  - git

gitfs_profider: pygit2

#gitfs_base: 2017.12

gitfs_remotes:
  - ssh://gituser@mygitrepo/home/gituser/reponame:
    - root: salt
    - base: 2017.12
    - user: gituser
    - insecure_auth: False
    - pubkey: /root/.ssh/id_rsa.pub
    - privkey: /root/.ssh/id_rsa
```

On git host:
pillar `top.sls`:  

```yaml
base:
  '*':
    - something1
    - something2
  
  'nodemame:host1':
    - match: grain
    - something3
    - something4
```

On salt `top.sls`:

```yaml
base:
  'G@os:someOSdetectedbyGrain:
    - state1
    - state2
```