Git cannot lock ref 'HEAD': unable to resolve reference HEAD

I'm trying to commit the changes to my repository but I receive the error below:

git -c diff.mnemonicprefix=false -c core.quotepath=false commit -q -F C:\Users\Contronym\AppData\Local\Temp\bkdweixb.mnu
fatal: cannot lock ref 'HEAD': unable to resolve reference HEAD: Invalid argument

Completed with errors, see above.

I'm using bitbucket and SourceTree.

What's the reason for this commit failing? I was able to commit just fine the last 3 commits over the past week. Then, all of a sudden, I receive this error.

EDIT

I ran git gc and these are the results:

$ git gc
error: bad ref for HEAD
error: bad ref for HEAD
error: inflate: data stream error (unknown compression method)
fatal: loose object 53b65bd9b4fec7f6a7b0b3313c68199a18804327 (stored in .git/objects/53/b65bd9b4fec7f6a7b0b3313c68199a18804327) is corrupt
error: failed to run repack

I checked the directory .git/objects/53/b65bd9b4fec7f6a7b0b3313c68199a18804327 but that doesn't exist. There's two other files there, but b65bd9b4fec7f6a7b0b3313c68199a18804327 doesn't exist.

I had the same problem and the only solution that I found was to navigate to the head like so:

.git/refs/heads/branch_name 

And I deleted the head file. Then I went to the console and I used the command:

git reset

Then all the files were unstaged so add them and commit them afterwards.

I had the same problem, this worked for me:

Step 1.

• go to .git\logs\refs\heads and open the Document named as YOUR_BRANCH, now copy the ID numbers in front of your user name and email

Step 2.

• go to .git\refs\heads and open the document named as YOUR_BRANCH delete the line and paste the ID in.

1. Navigate to directory .git/refs/heads/branch_name

2. Delete the preferred branch name

3. Open terminal(git bash or cmd for windows)

   git reset

4. Commit the changes (if necessary)

5. Run the following command for merging the remote repository branch

   git pull
   

   If it gives related to refusing to merge unrelated histories, run the following command in the terminal:

   git pull origin master --allow-unrelated-histories
   

Worked for me, into terminal enter: (branch accordingly to your desires lul)

echo ref: refs/heads/master >.git/HEAD

I had the same issue after calling git commands with the root user inside the working copy. So the owner and owner group of various files under .git/ were changed to "root".

When I switched back to my user account, git could not handle this files anymore, because of the lacking permissions.

It worked again, after resetting the permissions with

sudo chown -R [MY_USER]:[MY_GROUP] .git

I had this problem and I used this command:

git reset

When I run into this I just git clone the project into a new file directory and pull the heads folder from located at .git\refs\heads and replace the original heads file in the directory that your having the problem. Then just delete the new clone you created (since it obviously doesn't have the updates your trying to push).

This is what fixed my issue:

rm -rf .git/refs/heads/

1. Delete your .git folder

git init
git remote add origin url
git commit -m 'msg'
git push origin dev

Remove the file .git/ORIG_HEAD then pull again. For me the .git/ORIG_HEAD file was 0 bytes and has .lock extension instead of the git reference it was supposed to contain, so I just got rid of it.

I had the same problem, today. I found a very easy workaround to this problem but has a few trade-offs. I am still not sure what caused it in the first place. I came across a lot of solutions, and unfortunately, nothing really worked for me.

I could not initialize a GitHub repo during this error, which actually helped me find a solution. Apparently, just deleting the .git directory solves a lot of issues. Just when I deleted that directory, I was able to initialize a repo. You shall find the .git folder in your workspace. .git(dir)/config(file) . the config file may be broken and could be the source of the issue. (I am not sure of the cause, any explanations in laymen would be much appreciated)

just when I deleted the folder, all the errors vanished. I was also able to commit from GitHub desktop (which was throwing me the error, previously, the same error while committing directly from the IDE)

The only downside to this would be, all your staged changes might be lost, that is only it. And you may have to initialize a new repo because giving the same name would throw error(if the same repo already exists)

So, apart from that, you shall be good to go. You can commit changes too now.

I have the same problem. I just used command:

git reset

Than I removed file /my_project_directory/./git/refs/heads/master and than I can use this command:

git reset --hard <my_hash_of_last_commit_on_remote_branch>

If you don't mind losing your history, you can delete the .git file and then:

git init

This will reinitialize your repository and you can then proceed from there.

Clone the project again, install modules and checkout to your branch. It will be restore the state.