Fix for CVE-2019-10392 in jenkinsci/git-client-plugin (project jenkinsci__git-client-plugin_CVE-2019-10392_2.8.4), commit 899123fa2eb9dd2c37137aae630c47c6be6b4b02
Fixed file: src/main/java/org/jenkinsci/plugins/gitclient/CliGitAPIImpl.java
Fixed class: CliGitAPIImpl (lines 78-3110)
Fixed method: refExists (lines 2830-2836)
Method signature: boolean refExists(String)