The ORES model repos have had broken LFS mirroring for a while. But now it appears as though the regular code changes are also not coming through either. See T223782#7637184 for recent deployment work that ran into this issue.
See also https://wikitech.wikimedia.org/wiki/ORES/Prepare_deployment for discussion of the manual mirroring of LFS we have been doing.
In the meantime, the work-around is to replace git lfs push gerrit master with git push gerrit master in those instructions.