$ git clone -n https://src.fedoraproject.org/rpms/rust-unicode_categories.git /var/lib/mock/f38-build-side-43-rust-devel-1417213-31459/root/chroot_tmpdir/scmroot/rust-unicode_categories
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1417213-31459/root/chroot_tmpdir/scmroot/rust-unicode_categories'...
$ git fetch origin 2511d12b4a3d6f3dd0f46f2301b81c56e9d2143c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-unicode_categories
 * [new ref]         2511d12b4a3d6f3dd0f46f2301b81c56e9d2143c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2511d12 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild