$ git clone -n https://src.fedoraproject.org/rpms/plplot.git /var/lib/mock/f38-build-side-42-init-devel-1150530-30489/root/chroot_tmpdir/scmroot/plplot
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1150530-30489/root/chroot_tmpdir/scmroot/plplot'...
$ git fetch origin 66719c7e42e2376e37d0e391c66029a76453da30:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plplot
 * [new ref]         66719c7e42e2376e37d0e391c66029a76453da30 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 66719c7 Rebuild OCaml packages for F38