Ambiguous 'HEAD' issue.

Hello,

Recently I changed one of my repo's origin URL from gitlab to github.  After this switch, I start getting:

  warning: refname 'HEAD' is ambiguous.

messages when I use 'git status'. I check various things if I have tags/branches to blame but cannot find anything:

* git show-ref | grep -i head -> nothing suspicious

* find . -name HEAD | grep -v modules -> only .git/logs/HEAD and .git/HEAD

* git branch -a | grep HEAD -> nothing

Do you have any suggestions for a possible fix to this?

Thanks, Caglar