Instructions here are pretty good:

https://github.com/jgitver/jgitver-maven-plugin/wiki/automatic-builds-for-maven%2C-jenkins-and-gitbucket

On Windows Client:

Edit (as Administrator) C:\Windows\System32\drivers\etc\hosts and add the following:

192.168.1.116        gitbucket.localdomain
192.168.1.116        jenkins.localdomain

On MacOSX Clients:

sudo vi /etc/hosts

and add as above