$ git clone -n https://src.fedoraproject.org/rpms/kiwi.git /var/lib/mock/f42-build-278-53/root/chroot_tmpdir/scmroot/kiwi
Cloning into '/var/lib/mock/f42-build-278-53/root/chroot_tmpdir/scmroot/kiwi'...
$ git fetch origin f12f6374b4f5f55876d97b9e7d59cb1ce7b9f477:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kiwi
 * [new ref]         f12f6374b4f5f55876d97b9e7d59cb1ce7b9f477 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f12f637 Update to 10.2.27