No visit for that origin (according to the mirror swh db, the one that is read by the api):
You are connected to database "softwareheritage" as user "guest" on host "somerset.internal.softwareheritage.org" at port "5433".
SSL connection (protocol: TLSv1.2, cipher: ECDHE-RSA-AES256-GCM-SHA384, bits: 256, compression: off)
softwareheritage=> select * from origin_visit where origin=34927854;
 origin | visit | date | status | metadata
--------+-------+------+--------+----------
(0 rows)

Same on main db:
softwareheritage=> \conninfo
You are connected to database "softwareheritage" as user "swhstorage" on host "db.internal.softwareheritage.org" at port "5432".
SSL connection (protocol: TLSv1.2, cipher: ECDHE-RSA-AES128-GCM-SHA256, bits: 128, compression: off)
softwareheritage=> select * from origin_visit where origin=34927854;
 origin | visit | date | status | metadata
--------+-------+------+--------+----------
(0 rows)

Checking the scheduler, that origin is referenced:
    id    |       type        |                             arguments                             |           next_run           | current_interval |       status
----------+-------------------+-------------------------------------------------------------------+-------------------------------+------------------+--------------------
 33890834 | origin-update-git | {"args": ["https://github.com/openpreserve/jhove"], "kwargs": {}} | 2017-03-04 12:40:45.098258+00 | 32 days          | next_run_scheduled
(1 row)

(END)