$ git clone -n https://src.fedoraproject.org/rpms/rust-serde-value.git /var/lib/mock/f40-build-2063683-49167/root/chroot_tmpdir/scmroot/rust-serde-value
Cloning into '/var/lib/mock/f40-build-2063683-49167/root/chroot_tmpdir/scmroot/rust-serde-value'...
$ git fetch origin 3f7e1fb50b47d6f40f601bc7987e241a6d2186b9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-serde-value
 * [new ref]         3f7e1fb50b47d6f40f601bc7987e241a6d2186b9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3f7e1fb Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild