$ git clone -n https://src.fedoraproject.org/rpms/gensio.git /var/lib/mock/f40-build-2439670-60959/root/chroot_tmpdir/scmroot/gensio
Cloning into '/var/lib/mock/f40-build-2439670-60959/root/chroot_tmpdir/scmroot/gensio'...
$ git fetch origin 5551616e395a7d8941a2d4c2659df9c445249d7b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gensio
 * [new ref]         5551616e395a7d8941a2d4c2659df9c445249d7b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5551616 update to 2.8.3