$ git clone -n https://src.fedoraproject.org/rpms/mlir.git /var/lib/mock/f38-build-side-42-init-devel-660886-26629/root/chroot_tmpdir/scmroot/mlir
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-660886-26629/root/chroot_tmpdir/scmroot/mlir'...
$ git fetch origin e01cab08517b6e9be6cd73428b0bad40eceb62cd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mlir
 * [new ref]         e01cab08517b6e9be6cd73428b0bad40eceb62cd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e01cab0 Disable s390x builds temporarily