fix: remove hack to workaround GitHub Rebase & Merge

lib/git.js

@@ -1,4 +1,3 @@
-const {matches, pick, memoize} = require('lodash');
 const gitLogParser = require('git-log-parser');
 const getStream = require('get-stream');
 const execa = require('execa');
@@ -70,21 +69,16 @@ async function getBranches(repositoryUrl, execaOpts) {
     .filter(Boolean);
 }
 
-const getBranchCommits = memoize((branch, execaOpts) =>
-  getStream.array(gitLogParser.parse({_: branch}, {cwd: execaOpts.cwd, env: {...process.env, ...execaOpts.env}}))
-);
-
 /**
  * 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 {Boolean} findRebasedTags Weither consider in history tags associated with a commit that was rebased to another branch (i.e. GitHub Rebase and Merge feature).
  * @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, findRebasedTags, execaOpts) {
+async function isRefInHistory(ref, branch, execaOpts) {
   if (!(await isRefExists(branch, execaOpts))) {
     return false;
   }
@@ -94,13 +88,6 @@ async function isRefInHistory(ref, branch, findRebasedTags, execaOpts) {
     return true;
   } catch (error) {
     if (error.exitCode === 1) {
-      if (findRebasedTags) {
-        const [tagCommit] = await getStream.array(
-          gitLogParser.parse({_: ref, n: '1'}, {cwd: execaOpts.cwd, env: {...process.env, ...execaOpts.env}})
-        );
-        return (await getBranchCommits(branch, execaOpts)).some(matches(pick(tagCommit, ['message', 'author'])));
-      }
-
       return false;
     }
 
@@ -288,7 +275,7 @@ async function verifyBranchName(branch, execaOpts) {
 async function isBranchUpToDate(repositoryUrl, branch, execaOpts) {
   const {stdout: remoteHead} = await execa('git', ['ls-remote', '--heads', repositoryUrl, branch], execaOpts);
   try {
-    return await isRefInHistory(remoteHead.match(/^(\w+)?/)[1], branch, false, execaOpts);
+    return await isRefInHistory(remoteHead.match(/^(\w+)?/)[1], branch, execaOpts);
   } catch (error) {
     debug(error);
   }