service repo failed:

repo has been initialized in /data/service/repo
error: in `sync --fetch-submodules`: revision master in sledges/droid-bin-hammerhead not found
Usage: /usr/lib/obs/service//repo --service --initrepo --branch | --tag [--outdir ]
Options:
--service Git hosting service to use (github|mer|jolla)
--initrepo Repository path to check out
--branch Branch to use for repo init
--tag Tag to use for repo init
--outdir Move files to outdir after checkout (optional)

Examples:
/usr/lib/obs/service//repo --service github --initrepo mer-hybris/android --branch hybris-10.1

Only one instance of this service can run at once.

Command line was:

'repo sync' command failed