$ sudo apt-get remove dgit 

Uninstall dgit including dependent package

If you would like to remove dgit and it's dependent packages which are no longer needed from Ubuntu,

$ sudo apt-get remove --auto-remove dgit 

Use Purging dgit

If you use with purge options to dgit package all the configuration and dependent packages will be removed.

$ sudo apt-get purge dgit 

If you use purge options along with auto remove, will be removed everything regarding the package, It's really useful when you want to reinstall again.

$ sudo apt-get purge --auto-remove dgit 

See Also,