$ git clone -n https://src.fedoraproject.org/rpms/ncl.git /var/lib/mock/f40-build-2265113-54587/root/chroot_tmpdir/scmroot/ncl
Cloning into '/var/lib/mock/f40-build-2265113-54587/root/chroot_tmpdir/scmroot/ncl'...
$ git fetch origin 68f7e2f40fb4d00901e508d05ee3b86fe008801b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ncl
 * [new ref]         68f7e2f40fb4d00901e508d05ee3b86fe008801b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 68f7e2f Rebuild for jasper 4.1