$ git clone -n https://src.fedoraproject.org/rpms/jansi.git /var/lib/mock/f42-build-3403674-45135/root/chroot_tmpdir/scmroot/jansi
Cloning into '/var/lib/mock/f42-build-3403674-45135/root/chroot_tmpdir/scmroot/jansi'...
$ git fetch origin f10e033636d192abb2aea9fc738439bedae43b4a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jansi
 * [new ref]         f10e033636d192abb2aea9fc738439bedae43b4a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f10e033 Remove javadoc subpackage