在GoCI的构建管道的GitHistoryChecker阶段出现错误，并显示以下错误：
05:48:41.029 FAILURE: [git commit hash] has not been signed with a valid signature
05:48:41.029
05:48:41.030 Date: 2018-11-15 13:49:12 +0000
05:48:41.030 Author: Stefan Brink <stefan@jemstep.com>
05:48:41.030 Committer: Stefan Brink <stefan@jemstep.com>
05:48:41.030 Commit Date: 2018-11-15 13:49:12 +0000
05:48:41.030 SHA: [SHA here]
我该如何解决？