fix: verify is branch is up to date by comparing remote and local HEAD

lib/git.js

@@ -69,33 +69,6 @@ async function getBranches(repositoryUrl, execaOpts) {
     .filter(Boolean);
 }
 
-/**
- * Verify if the `ref` is in the direct history of a given branch.
- *
- * @param {String} ref The reference to look for.
- * @param {String} branch The branch for which to check if the `ref` is in history.
- * @param {Object} [execaOpts] Options to pass to `execa`.
- *
- * @return {Boolean} `true` if the reference is in the history of the current branch, falsy otherwise.
- */
-async function isRefInHistory(ref, branch, execaOpts) {
-  if (!(await isRefExists(branch, execaOpts))) {
-    return false;
-  }
-
-  try {
-    await execa('git', ['merge-base', '--is-ancestor', ref, branch], execaOpts);
-    return true;
-  } catch (error) {
-    if (error.exitCode === 1) {
-      return false;
-    }
-
-    debug(error);
-    throw error;
-  }
-}
-
 /**
  * Verify if the `ref` exits
  *
@@ -310,12 +283,10 @@ async function verifyBranchName(branch, execaOpts) {
  * @return {Boolean} `true` is the HEAD of the current local branch is the same as the HEAD of the remote branch, falsy otherwise.
  */
 async function isBranchUpToDate(repositoryUrl, branch, execaOpts) {
-  const {stdout: remoteHead} = await execa('git', ['ls-remote', '--heads', repositoryUrl, branch], execaOpts);
-  try {
-    return await isRefInHistory(remoteHead.match(/^(?<ref>\w+)?/)[1], branch, execaOpts);
-  } catch (error) {
-    debug(error);
-  }
+  return (
+    (await getGitHead(execaOpts)) ===
+    (await execa('git', ['ls-remote', '--heads', repositoryUrl, branch], execaOpts)).stdout.match(/^(?<ref>\w+)?/)[1]
+  );
 }
 
 /**
@@ -355,7 +326,6 @@ module.exports = {
   getTags,
   getCommits,
   getBranches,
-  isRefInHistory,
   isRefExists,
   fetch,
   fetchNotes,