refactor: harmonize git utils function names

lib/definitions/plugins.js

@@ -1,5 +1,5 @@
 const {isString, isPlainObject} = require('lodash');
-const {gitHead} = require('../git');
+const {getGitHead} = require('../git');
 const hideSensitive = require('../hide-sensitive');
 const {hideSensitiveValues} = require('../utils');
 const {RELEASE_TYPE, RELEASE_NOTES_SEPARATOR} = require('./constants');
@@ -52,7 +52,7 @@ module.exports = {
     dryRun: false,
     pipelineConfig: ({generateNotes}) => ({
       getNextInput: async context => {
-        const newGitHead = await gitHead({cwd: context.cwd});
+        const newGitHead = await getGitHead({cwd: context.cwd});
         // If previous prepare plugin has created a commit (gitHead changed)
         if (context.nextRelease.gitHead !== newGitHead) {
           context.nextRelease.gitHead = newGitHead;