Wrong hash of `debian-minimal-rootfs`?

[giordano]

https://github.com/staticfloat/Sandbox.jl/blob/ed87f079edb1cef60c32ad5fbfbcd38c70a1314a/Artifacts.toml#L17-L23

julia> using CodecZlib, Downloads, Tar

julia> tarball = Downloads.download("https://github.com/JuliaCI/rootfs-images/releases/download/v4.4/debian_minimal.x86_64.tar.gz");

julia> bytes2hex(open(io -> sha256(io), tarball))
"7e5f2625e6ca9a105430e0a505896184b503dfc3a7ce15916d2b8dca0391e65d"

julia> tar_gz = open(tarball);

julia> tar = GzipDecompressorStream(tar_gz);

julia> Tar.tree_hash(tar)
"97fd72e5d9f3d8902dca83ed3182c7b12a9ce446"

julia> close(tar)

julia> close(tar_gz)

julia> versioninfo()
Julia Version 1.7.1
Commit ac5cc99908 (2021-12-22 19:35 UTC)
Platform Info:
  OS: Linux (x86_64-pc-linux-gnu)
  CPU: Intel(R) Core(TM) i7-4870HQ CPU @ 2.50GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-12.0.1 (ORCJIT, haswell)

The sha256 checksum is the same, but the git tree hash is different

[giordano]

Tests on macOS fail for me when downloading this tarball, but interestingly enough I get yet another tree hash:

  Downloaded artifact: debian-minimal-rootfs
 Downloading artifact: debian-minimal-rootfs
┌ Error: Tree Hash Mismatch!
│   Expected git-tree-sha1:   f2dd967ccbf4ab29781388f5848f8d17a4a4e0bc
│   Calculated git-tree-sha1: 056f475c25cf8da6bcdbbe018a57a89225f13907
  Downloaded artifact: debian-minimal-rootfs
Internet access: Error During Test at /Users/mose/.julia/dev/Sandbox/test/Sandbox.jl:297
  Got exception outside of a @test
  Unable to automatically install 'debian-minimal-rootfs' from '/Users/mose/.julia/dev/Sandbox/Artifacts.toml'

but running the script above gives me the same output as above (git tree hash = 97fd72e5d9f3d8902dca83ed3182c7b12a9ce446), which confuses me more and more.

Edit: maybe I'm confused about how the git tree hash is computed because I get a different result also for the alpine rootfs, but the fact that the download of the Debian image on macOS fails because of the hash still stands.