Passing Parameters to Crontab

Hello Experts,

I have a requirement to pass some parameters to Linux cron tab.
For ex: My default cron entry looks like this as below:
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However I want to pass ¨system hostname¨ as a parameter as below:
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Whenever new cron entry appears, I have to modify it manually, but it is not feasible for me.

Could you guide me how can I achieve this using Shell script?

Regards,
Mahesh