Issue with git pull master is out of sync with origin master

问题

These are the sequence of steps I have performed:

1. committed my changes in branch to local master (commit id dc9afg2k)
2. git fetch origin master && git merge origin master
3. git checkout master
4. git pull (this pulled all recent changes)
5. git fetch origin master && git merge origin master
6. git reset --hard origin/master
7. git checkout branch
8. git blog
9. git reset --hard dc9afg2k (commit successful)
10. git checkout master
11. git log (this was gone back to 2 days ago).
12. git pull (master is not updating with current origin/master).

回答1:

An out of sync master can happen when the remote repo has received a forced push (git push --force) which rewrite the history.

If you have done commits of your own on master:

• make a branch (to remember the current master state)
  git branch old_master

• make sure you don't have any private file you need to save.

• follow this guide

That would be:

git fetch origin
git reset --hard origin/master
git clean -f -d

(you can preview the last cleaning steap with a '-n' option: git clean -n -f -d)

---

Note that git fetch origin master && git merge origin master could be a git pull origin master: the interest of keeping the two steps separated is to look at the difference between master and origin/master before the merge.
If you don't make that diff, then a git pull is simpler.

来源：https://stackoverflow.com/questions/18907689/issue-with-git-pull-master-is-out-of-sync-with-origin-master