$ git clone -n https://src.fedoraproject.org/rpms/python-plac.git /var/lib/mock/f42-build-side-1-3514858-46092/root/chroot_tmpdir/scmroot/python-plac
Cloning into '/var/lib/mock/f42-build-side-1-3514858-46092/root/chroot_tmpdir/scmroot/python-plac'...
$ git fetch origin 705dedcbe454d3d9323d4709cc13c1a21cc8ab5c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-plac
 * [new ref]         705dedcbe454d3d9323d4709cc13c1a21cc8ab5c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 705dedc F41+: Use the provisional pyproject declarative buildsystem