git branch -d <BRANCH>: Fatal - Couldn't look up commit object for HEAD

问题:

Say I am in a bare repository (a remote), if I try to delete a branch with git branch -d <branch_name> I get the following error:

fatal: Couldn't look up commit object for HEAD

Why? Is there a reason why I should be unable to delete branches from a bare repository?

回答1:

Make sure you use a capitol D in the command, in this case you would type git branch -D <branch_name>. Note that this will only delete the branch from your local computer

If you are trying to delete a remote branch, type git push origin :<branch_name> (remember to add the colon)

回答2:

To avoid this confusion you can use

"git push origin --delete branch_name"

this deletes remote branch not local branch.

回答3:

Find the file .git/refs/heads/branch_name in Windows Explorer and directly delete it.

回答4:

This only happens when the default branch (the branch HEAD in the bare repository folder is pointing to - usually master) doesn't exist locally. If it does exist - you would be able to delete the branch with branch -d even from a bare repository folder (-d assuming it was merged).

If you are working with git worktrees - issuing the command from the worktree may succeed (same condition regarding HEAD of the worktree should be met)

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