A caution about git branch names with ‘/’s

Git, you tricky bastard.

Let’s say I first create a branch named ‘wip/foo':

git branch wip/foo

Git will create a file named ‘foo’ in the folder .git/refs/head/wip/. Now, suppose I attempt to create a new branch named ‘wip/foo/foo-offshoot’. git will return an error:

error: unable to create directory for .git/refs/heads/wip/foo/foo-offshoot
fatal: Failed to lock ref for update: No such file or directory

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