E: Package 'git' has no installation candidate, how to resolve?

Question

I am facing below issue while installation time of git

sudo apt-get install git
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Package git is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package 'git' has no installation candidate

Note: I have uninstall and trying to install again.

Below is the output of sudo apt update

Hit:1 http://ppa.launchpad.net/gezakovacs/ppa/ubuntu xenial InRelease
Hit:2 https://download.docker.com/linux/ubuntu xenial InRelease               
Hit:3 http://ppa.launchpad.net/maarten-baert/simplescreenrecorder/ubuntu xenial InRelease
Hit:4 http://ppa.launchpad.net/nilarimogard/webupd8/ubuntu xenial InRelease   
Reading package lists... Done
Building dependency tree       
Reading state information... Done
All packages are up to date.