$ git clone -n https://src.fedoraproject.org/rpms/rust-darling_macro0.13.git /var/lib/mock/f40-build-2640611-66406/root/chroot_tmpdir/scmroot/rust-darling_macro0.13
Cloning into '/var/lib/mock/f40-build-2640611-66406/root/chroot_tmpdir/scmroot/rust-darling_macro0.13'...
$ git fetch origin de9bc8a7002a690480c459e3b75afdd42b64d89a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-darling_macro0.13
 * [new ref]         de9bc8a7002a690480c459e3b75afdd42b64d89a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at de9bc8a Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild