How to Openstack Devstack Switch git Branch (Keystone)

1)
saju@saju-VirtualBox:/opt/stack/keystone$
saju@saju-VirtualBox:/opt/stack/keystone$ git remote add sajucld https://github.com/kwss/keystone.git
saju@saju-VirtualBox:/opt/stack/keystone$

2)
saju@saju-VirtualBox:/opt/stack/keystone$ git remote -v
sajucld    https://github.com/kwss/keystone.git (fetch)
sajucld    https://github.com/kwss/keystone.git (push)
origin    https://github.com/openstack/keystone.git (fetch)
origin    https://github.com/openstack/keystone.git (push)
saju@saju-VirtualBox:/opt/stack/keystone$

3)
saju@saju-VirtualBox:/opt/stack/keystone$ git fetch sajucld
remote: Counting objects: 1172, done.
remote: Compressing objects: 100% (512/512), done.
remote: Total 914 (delta 578), reused 724 (delta 398)
Receiving objects: 100% (914/914), 316.91 KiB | 27.00 KiB/s, done.
Resolving deltas: 100% (578/578), completed with 93 local objects.
From https://github.com/kwss/keystone
 * [new branch]      bp/role-mapping-service-keystone -> sajucld/bp/role-mapping-service-keystone
 * [new branch]      feature/keystone-v3 -> sajucld/feature/keystone-v3
 * [new branch]      fed-plugin-moonshot -> sajucld/fed-plugin-moonshot
 * [new branch]      federated_auth_plugin -> sajucld/federated_auth_plugin
 * [new branch]      idp-service -> sajucld/idp-service
 * [new branch]      kent-federated-april -> sajucld/kent-federated-april
 * [new branch]      master     -> sajucld/master
 * [new branch]      role-mapping -> sajucld/role-mapping
 * [new branch]      stable/diablo -> sajucld/stable/diablo
 * [new branch]      stable/essex -> sajucld/stable/essex
 * [new branch]      stable/folsom -> sajucld/stable/folsom
saju@saju-VirtualBox:/opt/stack/keystone$

4)
saju@saju-VirtualBox:/opt/stack/keystone$ git checkout --track sajucld/feature/keystone-v3
Branch feature/keystone-v3 set up to track remote branch feature/keystone-v3 from sajucld.
Switched to a new branch 'feature/keystone-v3'
saju@saju-VirtualBox:/opt/stack/keystone$

5)
saju@saju-VirtualBox:/opt/stack/keystone$ git branch
* feature/keystone-v3
  master
saju@saju-VirtualBox:/opt/stack/keystone$

6)
Switch to working devstack branch
#git checkout mater

Goto devstack screen
#screen -x
* Press "Ctrl +  a + 1", to goto keystone log
* Press "Ctrl + c" to stop keystone service
* Press Up arrow and press Enter to Start keystone service again

7)
Switch to dev/testing branch
#git checkout feature/keystone-v3

Goto devstack screen
#screen -x
* Press "Ctrl +  a + 1", to goto keystone log
* Press "Ctrl + c" to stop keystone service
* Press Up arrow and press Enter to Start keystone service again