abc.sls

a:
  lorem.ipsum

x:
  lorem.dolor

y:
  lorem.sit

b:
  lorem.amet:
    - require:
      - lorem: a
      - lorem: x
      - lorem: y

c:
  lorem.consectetur:
    - require:
      - lorem: b

huh?.sls

git install for v2:
  pkg.installed:
    - name: git

bitbucket deploy key:
  file.managed:
    - name: /root/.ssh/id_rsa_deploy
    - source: salt://v2/ssh/id_rsa_deploy
    - mode: '0400'
    - makedirs: True
    - dir_mode: '0700'

bitbucket host:
  ssh_known_hosts.present:
    - name: bitbucket.org
    - user: root
    - enc: ssh-rsa
    - key: ___

bitbucket git:
  git.config_set:
    - name: user.email
    - value: "www@{{ grains['id'] }}.fooo.com"
    - user: root
    - global: True
  require:
    - pkg: git install for v2
    - file: bitbucket deploy key
    - ssh_known_hosts: bitbucket host

v2 application:
  git.latest:
    - name: {{ pillar.v2_git_repo }}
    - rev: {{ salt['pillar.get']( 'v2_git_rev', 'production') }}
    - target: {{ pillar.v2_doc_root }}
    - force_checkout: True
    - force_clone: True
    - force_reset: True
    - identity: /root/.ssh/id_rsa_deploy
    - require:
      - git: bitbucket git

the state v2 application fails with

     Comment: Failed to check remote refs: Unable to authenticate using identity file:
              The following identity file(s) were not found: /root/.ssh/id_rsa_deploy 

the state bitbucket deploy key runs after v2 application even though the dependencies would require it to run before, afaiu