handlers/merge_requests: retry fetching merge requests
Sometimes, the event for a merge request is sent before the ref is
available via git fetch
. Retry fetching a few times before giving up.
Cc: @matt-mccormick
Sometimes, the event for a merge request is sent before the ref is
available via git fetch
. Retry fetching a few times before giving up.
Cc: @matt-mccormick