$ git clone -n https://src.fedoraproject.org/rpms/rust-derive_builder0.9.git /var/lib/mock/f38-build-side-42-init-devel-1395600-31050/root/chroot_tmpdir/scmroot/rust-derive_builder0.9
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1395600-31050/root/chroot_tmpdir/scmroot/rust-derive_builder0.9'...
$ git fetch origin 642f31ed3e507e63a58ed3db5ed02e13a8118b52:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-derive_builder0.9
 * [new ref]         642f31ed3e507e63a58ed3db5ed02e13a8118b52 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 642f31e Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild