$ git clone -n https://src.fedoraproject.org/rpms/plasma-browser-integration.git /var/lib/mock/f42-build-side-1-3578388-46814/root/chroot_tmpdir/scmroot/plasma-browser-integration
Cloning into '/var/lib/mock/f42-build-side-1-3578388-46814/root/chroot_tmpdir/scmroot/plasma-browser-integration'...
$ git fetch origin 3c9af892ff5ba68180955d387f2797b7a6fde423:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-browser-integration
 * [new ref]         3c9af892ff5ba68180955d387f2797b7a6fde423 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3c9af89 6.4.1