$ git clone -n https://src.fedoraproject.org/rpms/novnc.git /var/lib/mock/f41-build-side-1-2821500-33222/root/chroot_tmpdir/scmroot/novnc
Cloning into '/var/lib/mock/f41-build-side-1-2821500-33222/root/chroot_tmpdir/scmroot/novnc'...
$ git fetch origin f7b4dbd45362bd61e19287db00eefc32fb06fcf5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/novnc
 * [new ref]         f7b4dbd45362bd61e19287db00eefc32fb06fcf5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f7b4dbd convert GPLv3 license to SPDX