BitBucket: Use commit hash instead of branch name when the branch is not URL-safe.
BitBucket: Use commit hash instead of branch name when the branch is not URL-safe.

Apparently, the "/src" subsection of the BitBucket API doesn't do well with branch names that contain slashes. urlencode() doesn't help. See #409 for the initial report.
YahnisElsts/plugin-update-checker,YahnisElsts/plugin-update-checker