I ran into an issue today where I was unable to pull changes from a remote repo. The error message was:

❯ git pull
error: cannot lock ref 'refs/remotes/origin/broken-branch/test-new-feature': 'refs/remotes/origin/broken-branch' exists; cannot create 'refs/remotes/origin/broken-branch/test-new-feature'
From github.com:muh-org/main-repo
 ! [new branch]            broken-branch/test-new-feature -> origin/broken-branch/test-new-feature  (unable to update local ref)

The fix ended up being to delete the local ref for each branch that was causing the issue:

❯ git update-ref -d refs/remotes/origin/broken-branch

❯ git pull
From github.com:muh-org/main-repo
 * [new branch]            broken-branch/test-new-feature -> origin/broken-branch/test-new-feature
 * [new branch]            broken-branch/upgrade-dd-monitor-version      -> origin/broken-branch/upgrade-dd-monitor-version
Updating a1a1a1a1a1..b2b2b2b2b2
Fast-forward
 dir/file1       | 118 +++++++++++++++++++++++++-------------------------
 dir/file2       | 118 +++++++++++++++++++++++++-------------------------
 dir/file3       |   2 +-
 dir/file4       |   4 --
 dir/file5       |   4 --
...