$ git clone -n https://src.fedoraproject.org/rpms/rust-zstd-safe.git /var/lib/mock/f39-build-1657735-40568/root/chroot_tmpdir/scmroot/rust-zstd-safe
Cloning into '/var/lib/mock/f39-build-1657735-40568/root/chroot_tmpdir/scmroot/rust-zstd-safe'...
$ git fetch origin a8beffa87e5cf11158950beac569f4decae8e83c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-zstd-safe
 * [new ref]         a8beffa87e5cf11158950beac569f4decae8e83c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a8beffa Update to version 6.0.6; Fixes RHBZ#2184800