$ git clone -n https://src.fedoraproject.org/rpms/rust-zvariant2.git /var/lib/mock/f40-build-2644606-66512/root/chroot_tmpdir/scmroot/rust-zvariant2
Cloning into '/var/lib/mock/f40-build-2644606-66512/root/chroot_tmpdir/scmroot/rust-zvariant2'...
$ git fetch origin 6bc071565f2781d6459702f8018abf1fb7dab6a4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-zvariant2
 * [new ref]         6bc071565f2781d6459702f8018abf1fb7dab6a4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6bc0715 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild