How change e-mail to use google's gmail instead of machine's prompt?

Hello, my short prompt in the console of my machine is
+---------------------------+
| net1@pc0:~$               |
+---------------------------+
I did

git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git

but net1@pc0 of my machine is logged in the files .git/logs/HEAD, .git/logs/refs/heads/master and .git/logs/refs/heads/remotes/origin/**some**

How can change it to use my own email jcpiza@gmail.com instead of my machine?

My machine has not static public IP (IPv4), it uses DHCP's dynamic IP and unfortunately i can't receive directly e-mails through the mbox of my machine.

So, i have to use google's gmail instead of the mail of mbox of my machine.

 I loved the old Internet but i hate the new Internet services-based when
 Internet is controlled by companies and governments for that you can't do
 anything because it's controlled by them instead of by your.

   #;)