To implement version control we are using git and bitbucket once the developers commit the code to bitbucket repo and merge it with existing branch, how reflect these changes from bitbucket to slaesforce org? 
We have one develpoer org and 10 developers are working on the same org.

Custom fields used in the process builder are not prefixed with the packaging org namespace.
Deployment is done from development org to packaging org using ANT. Do we need to modify package.xml file to achieve this?
Currently we are using Flow metadata type to deploy process builder

While moving code from developer org to packaging org using ANT in few places of the apex code we need to prefix the packaging namespace. Is there any way to automate this process?
For instance:
RecordType Test = [ SELECT Id, Name FROM RecordType WHERE SobjectType = 'abc__books__c' AND DeveloperName = 'bookreview' ];
In the above code abc is the namespace which is added manually.

Hi,

We thought of implementing version controlling so we planned to use git tool,bit Bucket and eclipse.
In eclipse using Git(Git Repository Exploring) we are able push/fetch the changes from remote repositories to local and vice versa but how to reflect these changes/versions in the salesfoce org?
The solution what we found is save to server option but this will create conflict when more than one developer working on same file.
Is there any alternative solution for this problem

We referred this link for configuring Git : http://www.jitendrazaa.com/blog/salesforce/salesforce-git-eclipse-egit-better-and-distributed-source-control/ 

Custom fields used in the process builder are not prefixed with the packaging org namespace.
Deployment is done from development org to packaging org using ANT. Do we need to modify package.xml file to achieve this?
Currently we are using Flow metadata type to deploy process builder