source-repository package git clone: fatal: '--detach' cannot be used with '-b/-B/--orphan'

[robx]

Describe the bug
I ran into the following error while working with a forked local dependency:

1. add a source-repository-package entry to cabal.project.local, pointing to a valid local repository but non-existent tag:

source-repository-package
  location: /s/bytestring-strict-builder
  type: git
  tag: unsafe

2. cabal build errors out as it should:

$ cabal build
Cloning into '[...]/dist-newstyle/src/bytestrin_-75233e9c287669b1'...
done.
fatal: invalid reference: unsafe

3. I create the branch in the forked repo
4. cabal build fails with an unexpected git error:

$ cabal build
[... regular git copying output]
From /s/bytestring-strict-builder
 * [new branch]      unsafe     -> origin/unsafe
fatal: '--detach' cannot be used with '-b/-B/--orphan'

After this, running cabal build again reports the same error. After wiping dist-newstyle/src/bytestr*, the build works fine.

To Reproduce

I've run the above steps again and arrived at the same result. I have not yet made sure it happens with arbitrary repositories instead of the specific ones I encountered this with, though I expect it to be a general issue.

Expected behavior
In step 4, cabal build should manage to check out the correct branch.

System information

• Operating system: macOS 12.4
• cabal 3.6.2.0 via ghcup, git in PATH is git version 2.32.1 (Apple Git-133) (but I'm not entirely sure this is what cabal calls)

Additional context
This is related to #6888. However, that ticket is specific to the redundant branch setting, while this one appears to be a bug with tag which I understand to be the "standard" way to specify a revision.