$ git clone -n https://src.fedoraproject.org/rpms/rust-nix0.22.git /var/lib/mock/f40-build-2642491-66455/root/chroot_tmpdir/scmroot/rust-nix0.22
Cloning into '/var/lib/mock/f40-build-2642491-66455/root/chroot_tmpdir/scmroot/rust-nix0.22'...
$ git fetch origin 6c10f6b251ceda0a516d290f43004ae44ff0316e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-nix0.22
 * [new ref]         6c10f6b251ceda0a516d290f43004ae44ff0316e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6c10f6b Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild