$ git clone -n https://src.fedoraproject.org/rpms/rust-zvariant.git /var/lib/mock/f40-build-2326332-58830/root/chroot_tmpdir/scmroot/rust-zvariant
Cloning into '/var/lib/mock/f40-build-2326332-58830/root/chroot_tmpdir/scmroot/rust-zvariant'...
$ git fetch origin 6fbac28213ec5389d18eaadc876763d2164a3bb8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-zvariant
 * [new ref]         6fbac28213ec5389d18eaadc876763d2164a3bb8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6fbac28 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild