$ git clone -n https://src.fedoraproject.org/rpms/jctools.git /var/lib/mock/f38-build-side-42-init-devel-645248-26400/root/chroot_tmpdir/scmroot/jctools
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-645248-26400/root/chroot_tmpdir/scmroot/jctools'...
$ git fetch origin 4be4007f57293e85930dd99b9913495d53ba2f4a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jctools
 * [new ref]         4be4007f57293e85930dd99b9913495d53ba2f4a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4be4007 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild