【15-04-24】 【吐槽】使用yum老出现问题 如下 该怎么解决

failure: repodata/repomd.xml from copr.fedoraproject.org_coprs_mosquito_myrepo: [Errno 256] No more mirrors to try.
https://copr.fedoraproject.org/coprs/mosquito/myrepo/repodata/repomd.xml: [Errno 14] HTTPS Error 404 - Not Found