Git backup shift on SSH

right now the git backup is happening over https, It should happen over ssh. 
git ls-remote command doesnt work on ssh, if the private key is not available in the .ssh directory.

```
$ eval `ssh-agent -s`
To list the available keys:

$ ssh-add -l
The agent has no identities.
To add a new key:

$ ssh-add ~/.ssh/identity
```