$ git clone -n https://src.fedoraproject.org/rpms/rust-serde_spanned.git /var/lib/mock/f40-build-2658890-66918/root/chroot_tmpdir/scmroot/rust-serde_spanned
Cloning into '/var/lib/mock/f40-build-2658890-66918/root/chroot_tmpdir/scmroot/rust-serde_spanned'...
$ git fetch origin e3d6b8ea809c34758fb0900a3acb977520c88923:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-serde_spanned
 * [new ref]         e3d6b8ea809c34758fb0900a3acb977520c88923 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e3d6b8e Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild