This appears in the travis logs a few times:
usage: git rev-list [OPTION] <commit-id>... [ -- paths... ]
limiting output:
--max-count=<n>
--max-age=<epoch>
--min-age=<epoch>
--sparse
--no-merges
--min-parents=<n>
--no-min-parents
--max-parents=<n>
--no-max-parents
--remove-empty
--all
--branches
--tags
--remotes
--stdin
--quiet
(see for example https://travis-ci.org/bitcoin/bitcoin/jobs/54052269 ) Doesn't appear to break anything, but makes it even harder to find the real problem.
