$ git clone -n https://src.fedoraproject.org/rpms/ncl.git /var/lib/mock/f42-build-862959-171273/root/chroot_tmpdir/scmroot/ncl
Cloning into '/var/lib/mock/f42-build-862959-171273/root/chroot_tmpdir/scmroot/ncl'...
$ git fetch origin e1684744820292cf25bb5beda06c5b10d32100b9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ncl
 * [new ref]         e1684744820292cf25bb5beda06c5b10d32100b9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e168474 Rebuild (gdal)