From @viktorbenei on Sat Dec 10 2016 10:29:41 GMT-0500 (EST)
Right now artifacts are exposed with special, pre-signed, time limited URLs. This means that the exact download / access link for an artifact is generated and does change every time it’s accessed.
For more details see: https://github.com/jacoco/jacoco/issues/472
And the related discussion: https://github.com/bitrise-io/bitrise-contrib/issues/3#issuecomment-266070773
Copied from original issue: https://github.com/bitrise-io/bitrise.io/issues/103