This error suggests the HEAD reference in Git has been modified. It usually happens when cloning with a detached head. Resetting the HEAD can fix this issue.

The error 'fatal: ref HEAD is not a symbolic ref' means that Git has lost the symbolic reference from HEAD, which points to the active branch in a standard setup. Typically, this error arises when cloning or using a repository in a detached HEAD state, meaning HEAD is pointing directly at a commit instead of a branch. To resolve this, switch back to a valid branch using git checkout main (or the primary branch name in your repo) to reset the symbolic link of HEAD. If the branch doesn’t exist, use git branch -a to list all branches and create or switch to the appropriate one. Additionally, inspect the .git/HEAD file to ensure it points correctly to your branch by containing something like ref: refs/heads/main. Restoring HEAD to a symbolic ref fixes this issue, allowing Git to reference branches correctly moving forward.