$ git clone -n https://src.fedoraproject.org/rpms/kf6-kwayland.git /var/lib/mock/f38-build-side-42-init-devel-1415899-31434/root/chroot_tmpdir/scmroot/kf6-kwayland
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1415899-31434/root/chroot_tmpdir/scmroot/kf6-kwayland'...
$ git fetch origin fa1535d754076708ffea88ed145c4f30030a9c12:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kwayland
 * [new ref]         fa1535d754076708ffea88ed145c4f30030a9c12 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fa1535d Added the README