$ git clone -n https://src.fedoraproject.org/rpms/kf6-kcmutils.git /var/lib/mock/f42-build-side-1-3500308-45970/root/chroot_tmpdir/scmroot/kf6-kcmutils
Cloning into '/var/lib/mock/f42-build-side-1-3500308-45970/root/chroot_tmpdir/scmroot/kf6-kcmutils'...
$ git fetch origin 52b0a00b277a6f52b90ff50609874354985b6990:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kcmutils
 * [new ref]         52b0a00b277a6f52b90ff50609874354985b6990 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 52b0a00 6.13.0