Bash script to reload the current Chrome (or Safari) browser window

gistfile1.txt

#!/bin/bash

/usr/bin/osascript <<EOF
tell application "Google Chrome" 
  set docUrl to URL of (active tab of window 1)
  set URL of (active tab of window 1) to docUrl
end tell
EOF

# /usr/bin/osascript <<EOF
# tell application "Safari" 
#   set docUrl to URL of document 1
#   set URL of document 1 to docUrl
# end tell
# EOF

How can I refresh all the tabs if multiple tabs are opened?

Also I have another instance of safari open in desktop2, I want to refresh that as well

Here is the Scenario:
On my Macbook's desktop1 - 1 Browser containing two tabs opened

On my Macbook's desktop2 - 1 Browser with only one tab

I want to refresh them all at same time, any suggestions?