v20.1.0
This can be done through nebula.release.features.immutableSnapshot.timestampPrecision property
e.g.
nebula.release.features.immutableSnapshot.timestampPrecision=MINUTES
Supported values:
DAYS->yyyyMMddHOURS-> yyyyMMddHH`MINUTES->yyyyMMddHHmmSECONDS->yyyyMMddHHmmssMILLISECONDS->YYYYMMddHHmmssSSS
Full Changelog: v20.0.2...v20.1.0