$ git clone -n https://src.fedoraproject.org/rpms/rust-gix-submodule.git /var/lib/mock/f40-build-2402253-60556/root/chroot_tmpdir/scmroot/rust-gix-submodule
Cloning into '/var/lib/mock/f40-build-2402253-60556/root/chroot_tmpdir/scmroot/rust-gix-submodule'...
$ git fetch origin fcf2f0bdae92e51494220b1ddf66da0d317c1eca:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gix-submodule
 * [new ref]         fcf2f0bdae92e51494220b1ddf66da0d317c1eca -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fcf2f0b Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild