$ git clone -n https://src.fedoraproject.org/rpms/ck.git /var/lib/mock/f38-build-side-42-init-devel-907427-28633/root/chroot_tmpdir/scmroot/ck
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-907427-28633/root/chroot_tmpdir/scmroot/ck'...
$ git fetch origin dbcd0be1e534f179459234feb08674a91bd28b31:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ck
 * [new ref]         dbcd0be1e534f179459234feb08674a91bd28b31 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dbcd0be Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild