$ git clone -n https://src.fedoraproject.org/rpms/rust-derive_builder0.9.git /var/lib/mock/f40-build-2137126-50821/root/chroot_tmpdir/scmroot/rust-derive_builder0.9
Cloning into '/var/lib/mock/f40-build-2137126-50821/root/chroot_tmpdir/scmroot/rust-derive_builder0.9'...
$ git fetch origin ec81040db691f99ed1234363bdaa1e616cc670af:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-derive_builder0.9
 * [new ref]         ec81040db691f99ed1234363bdaa1e616cc670af -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ec81040 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild