$ git clone -n https://src.fedoraproject.org/rpms/rust-impls.git /var/lib/mock/f40-build-2325436-58807/root/chroot_tmpdir/scmroot/rust-impls
Cloning into '/var/lib/mock/f40-build-2325436-58807/root/chroot_tmpdir/scmroot/rust-impls'...
$ git fetch origin e02c2f3540c7386a3f67e2b6c05e3d6d0995f7ac:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-impls
 * [new ref]         e02c2f3540c7386a3f67e2b6c05e3d6d0995f7ac -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e02c2f3 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild