https://www.amazon.com/Master-Lock-Circuit-Breaker-Lockout/dp/B004J173I8?th=1
Leaving the circuit shorted won't prevent someone from flipping the breaker back on, and if you happen to be upstream of the short when that happens (and also touching the hot wire) you will become the short.
Master Lock 493B Lockout Tagout Circuit Breaker Lockout, Standard Single and Double Toggles https://www.amazon.com/dp/B004J173I8/ref=cm_sw_r_apan_i_5G8MY9R3MHYXKQMY0MBQ?_encoding=UTF8&psc=1
Install some loto devices to ensure you keep power?
Yeah man I got you