$ git clone -n https://src.fedoraproject.org/rpms/kiwi.git /var/lib/mock/f40-build-791663-137678/root/chroot_tmpdir/scmroot/kiwi
Cloning into '/var/lib/mock/f40-build-791663-137678/root/chroot_tmpdir/scmroot/kiwi'...
$ git fetch origin 36d1d7c5a4cb095eb5fdec8c0285870acc4a9cbd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kiwi
 * [new ref]         36d1d7c5a4cb095eb5fdec8c0285870acc4a9cbd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 36d1d7c Add dependency on xz