$ git clone -n https://src.fedoraproject.org/rpms/rust-rkyv_derive.git /var/lib/mock/f40-build-2327231-58851/root/chroot_tmpdir/scmroot/rust-rkyv_derive
Cloning into '/var/lib/mock/f40-build-2327231-58851/root/chroot_tmpdir/scmroot/rust-rkyv_derive'...
$ git fetch origin afd4c1c9c316a4c5464c6d9305214d6e9ac6bace:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rkyv_derive
 * [new ref]         afd4c1c9c316a4c5464c6d9305214d6e9ac6bace -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at afd4c1c Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild