Git refs/remotes/origin/master does not point to a valid object

Question

After the last merge to the master branch of my Git repository I have lost the ability to clone repository.

Cloning into test-repository...
remote: Counting objects:          


        

Answer 1

git gc
git fsck --full
git reflog expire --expire=0 --all
git update-ref -d 0d998c99b6d01e8aabca72b1934802acf90b8fc9
git gc --aggressive
git remote update --prune

and it worked!