$ git clone -n https://src.fedoraproject.org/rpms/plasma-workspace.git /var/lib/mock/f40-build-2595513-62744/root/chroot_tmpdir/scmroot/plasma-workspace
Cloning into '/var/lib/mock/f40-build-2595513-62744/root/chroot_tmpdir/scmroot/plasma-workspace'...
$ git fetch origin e31e1290e26393e726f8f53e02f795b75c70b02b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-workspace
 * [new ref]         e31e1290e26393e726f8f53e02f795b75c70b02b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e31e129 6.0.2