branches with "ref" in the name get incorrectly mangled for install
http://pulpito.ceph.com/gregf-2017-05-25_23:58:31-rgw:multisite-wip-19931-snaptrim-pgref---basic-mira/ contains two examples of this. https://shaman.ceph.com/builds/ceph/wip-19931-snaptrim-pgref/ indicates the packages were all built.
Selected lines from the teuthology log:
2017-05-26T00:10:53.745 INFO:teuthology.task.install.rpm:Pulling from https://3.chacra.ceph.com/r/ceph/wip-19931-snaptrim-pgref/138e24607b9c10eae7dbb722daebc92096ff415e/centos/7/flavors/notcmalloc/ ... 2017-05-26T00:10:57.697 INFO:teuthology.orchestra.run.mira112.stderr:https://3.chacra.ceph.com/r/ceph/wip-19931-snaptrim-pgsha1/138e24607b9c10eae7dbb722daebc92096ff415e/centos/7/flavors/notcmalloc/x86_64/repodata/repomd.xml: [Errno 14] HTTPS Error 404 - Not Found
Note that the branch (named wip-19931-snaptrim-pgref) has been truncated in the second line, and stuck together with what should be a "/sha1" segment in the URL. For reasons I haven't worked out, some installs of this branch do succeed; http://pulpito.ceph.com/gregf-2017-05-26_00:00:21-rados-wip-19931-snaptrim-pgref---basic-smithi/ contains 31 (of 100) which passed.