You had not concluded your merge (Merge_head exists) git pull failed

You have a not concluded your merge (Merge_head exists).
Please, commit your changes before you can merge.

The error may be caused by the fact that the code you pull down before is not automatically merged.

There are 2 solutions:

1. Keep your local changes

git merge--abort

git reset--merge

Make sure to submit this local merge after merging

And then get the online warehouse.

Git pull

2.down Offline code version, discard local changes

This is not recommended, but if you do not have local modifications, or you have a copy of your backup, you can directly overwrite the latest version of the online

git fetch--all

git reset--hard origin/master

git fetch

Of course, there is one of the most stupid way, is to clone a copy of the code, discard the working directory, haha, joking.