$ git clone -n https://src.fedoraproject.org/rpms/rust-derive_builder.git /var/lib/mock/f40-build-2091992-50257/root/chroot_tmpdir/scmroot/rust-derive_builder
Cloning into '/var/lib/mock/f40-build-2091992-50257/root/chroot_tmpdir/scmroot/rust-derive_builder'...
$ git fetch origin ee2fb1a7dcbe9058a4525358c2531140b1b37f52:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-derive_builder
 * [new ref]         ee2fb1a7dcbe9058a4525358c2531140b1b37f52 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ee2fb1a Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild