While running bin/setup getting below error

bin/setup
== Installing dependencies ==
Fetching https://github.com/ManageIQ/manageiq-gems-pending.git
fatal: unable to access ‘https://github.com/ManageIQ/manageiq-gems-pending.git/’: Could not resolve host: github.com; Unknown error

Retrying git clone 'https://github.com/ManageIQ/manageiq-gems-pending.git' "/usr/local/lib/ruby/gems/2.4.0/cache/bundler/git/manageiq-gems-pending-3d3e8d1418444707f6272567e1c83082cc8bbfab" --bare --no-hardlinks --quiet due to error (2/4): Bundler::Source::Git::GitCommandError Git error: command git clone 'https://github.com/ManageIQ/manageiq-gems-pending.git' "/usr/local/lib/ruby/gems/2.4.0/cache/bundler/git/manageiq-gems-pending-3d3e8d1418444707f6272567e1c83082cc8bbfab" --bare --no-hardlinks --quiet in directory /var/www/miq/vmdb has failed.
fatal: unable to access ‘https://github.com/ManageIQ/manageiq-gems-pending.git/’: Could not resolve host: github.com; Unknown error

Retrying git clone 'https://github.com/ManageIQ/manageiq-gems-pending.git' "/usr/local/lib/ruby/gems/2.4.0/cache/bundler/git/manageiq-gems-pending-3d3e8d1418444707f6272567e1c83082cc8bbfab" --bare --no-hardlinks --quiet due to error (3/4): Bundler::Source::Git::GitCommandError Git error: command git clone 'https://github.com/ManageIQ/manageiq-gems-pending.git' "/usr/local/lib/ruby/gems/2.4.0/cache/bundler/git/manageiq-gems-pending-3d3e8d1418444707f6272567e1c83082cc8bbfab" --bare --no-hardlinks --quiet in directory /var/www/miq/vmdb has failed.
fatal: unable to access ‘https://github.com/ManageIQ/manageiq-gems-pending.git/’: Could not resolve host: github.com; Unknown error

Retrying git clone 'https://github.com/ManageIQ/manageiq-gems-pending.git' "/usr/local/lib/ruby/gems/2.4.0/cache/bundler/git/manageiq-gems-pending-3d3e8d1418444707f6272567e1c83082cc8bbfab" --bare --no-hardlinks --quiet due to error (4/4): Bundler::Source::Git::GitCommandError Git error: command git clone 'https://github.com/ManageIQ/manageiq-gems-pending.git' "/usr/local/lib/ruby/gems/2.4.0/cache/bundler/git/manageiq-gems-pending-3d3e8d1418444707f6272567e1c83082cc8bbfab" --bare --no-hardlinks --quiet in directory /var/www/miq/vmdb has failed.
fatal: unable to access ‘https://github.com/ManageIQ/manageiq-gems-pending.git/’: Could not resolve host: github.com; Unknown error

Git error: command git clone 'https://github.com/ManageIQ/manageiq-gems-pending.git' "/usr/local/lib/ruby/gems/2.4.0/cache/bundler/git/manageiq-gems-pending-3d3e8d1418444707f6272567e1c83082cc8bbfab" --bare --no-hardlinks --quiet in directory /var/www/miq/vmdb has failed.

== Command [“bundle update --jobs=3”] failed in /var/www/miq/vmdb ==