First of all list the available installers – Look for the Version-String you will need it in the next step
# softwareupdate --list-full-installers
Finding available software
Software Update found the following full installers:
* Title: macOS Ventura, Version: 13.2, Size: 12261428KiB, Build: 22D49, Deferred: NO
* Title: macOS Ventura, Version: 13.1, Size: 11931164KiB, Build: 22C65, Deferred: NO
* Title: macOS Ventura, Version: 13.0.1, Size: 11866460KiB, Build: 22A400, Deferred: NO
* Title: macOS Ventura, Version: 13.0, Size: 11866804KiB, Build: 22A380, Deferred: NO
* Title: macOS Monterey, Version: 12.6.3, Size: 12115350KiB, Build: 21G419, Deferred: NO
* Title: macOS Monterey, Version: 12.6.2, Size: 12104568KiB, Build: 21G320, Deferred: NO
* Title: macOS Monterey, Version: 12.6.1, Size: 12108491KiB, Build: 21G217, Deferred: NO
* Title: macOS Big Sur, Version: 11.7.3, Size: 12119247KiB, Build: 20G1116, Deferred: NO
* Title: macOS Big Sur, Version: 11.7.2, Size: 12119307KiB, Build: 20G1020, Deferred: NO
* Title: macOS Big Sur, Version: 11.7.1, Size: 12119247KiB, Build: 20G918, Deferred: NO
* Title: macOS Big Sur, Version: 11.6.6, Size: 12121263KiB, Build: 20G624, Deferred: NO
* Title: macOS Big Sur, Version: 11.6.5, Size: 12121404KiB, Build: 20G527, Deferred: NO
* Title: macOS Big Sur, Version: 11.6.4, Size: 12147782KiB, Build: 20G417, Deferred: NO
* Title: macOS Big Sur, Version: 11.6.3, Size: 12143674KiB, Build: 20G415, Deferred: NO
* Title: macOS Big Sur, Version: 11.6.2, Size: 12141944KiB, Build: 20G314, Deferred: NO
* Title: macOS Big Sur, Version: 11.6.1, Size: 12137180KiB, Build: 20G224, Deferred: NO
* Title: macOS Big Sur, Version: 11.5.2, Size: 12149332KiB, Build: 20G95, Deferred: NO
* Title: macOS Catalina, Version: 10.15.7, Size: 8055650KiB, Build: 19H15, Deferred: NO
* Title: macOS Catalina, Version: 10.15.7, Size: 8055522KiB, Build: 19H2, Deferred: NO
* Title: macOS Catalina, Version: 10.15.6, Size: 8055450KiB, Build: 19G2021, Deferred: NO
* Title: macOS Mojave, Version: 10.14.6, Size: 5896894KiB, Build: 18G103, Deferred: NO
Next download the installer you need
# softwareupdate --fetch-full-installer --full-installer-version 13.2
Scanning for 13.2 installer
Install finished successfully