It used to say "GitHub URL ... is invalid", which is wrong and confusing. Change-Id: I89a00aee21a56710d6afdfa0510d4e9c6a6a6964
rev
Instead of manually reading the ref file, which gives the tag object hash when ref is a tag, shell out to git. The logic for finding the ref file is left for cache TTL tracking. Fixes: #1070 Change-Id: I490b1e62f83cf602c56232c6081a52166a6a6964