$ git clone -n https://src.fedoraproject.org/rpms/iaito.git /var/lib/mock/f41-build-side-1-3063650-38514/root/chroot_tmpdir/scmroot/iaito
Cloning into '/var/lib/mock/f41-build-side-1-3063650-38514/root/chroot_tmpdir/scmroot/iaito'...
$ git fetch origin 361b40d7caa1e9fedd2a6a032c80885313d48c8c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/iaito
 * [new ref]         361b40d7caa1e9fedd2a6a032c80885313d48c8c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 361b40d bump to 5.9.6