$ git clone -n https://src.fedoraproject.org/rpms/ncl.git /var/lib/mock/f42-build-3281183-41341/root/chroot_tmpdir/scmroot/ncl
Cloning into '/var/lib/mock/f42-build-3281183-41341/root/chroot_tmpdir/scmroot/ncl'...
$ git fetch origin 9e044d1b7854fbbcb6d89222a8772a1abee292ea:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ncl
 * [new ref]         9e044d1b7854fbbcb6d89222a8772a1abee292ea -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9e044d1 Rebuild with gsl 2.8