When I add the repo:

dnf config-manager --add-repo
https://download.opensuse.org/repositories/openSUSE:Tools/Fedora_30/openSUSE:Tools.repo

and then try to install the package:

dnf install build

I get the following errors:

Error: Transaction check error:
  file /usr/lib/build/build from install of build-20190709-318.2.noarch
conflicts with file from package obs-build-20190321-314.1.1.fc30.noarch
  file /usr/lib/build/build-pkg-rpm from install of build-20190709-318.2.noarch
conflicts with file from package obs-build-20190321-314.1.1.fc30.noarch
  file /usr/lib/build/build-recipe-simpleimage from install of
build-20190709-318.2.noarch conflicts with file from package
obs-build-20190321-314.1.1.fc30.noarch
  file /usr/lib/build/build-recipe-spec from install of
build-20190709-318.2.noarch conflicts with file from package
obs-build-20190321-314.1.1.fc30.noarch
  file /usr/lib/build/build-vm-openstack from install of
build-20190709-318.2.noarch conflicts with file from package
obs-build-20190321-314.1.1.fc30.noarch
  file /usr/lib/build/build-vm-qemu from install of build-20190709-318.2.noarch
conflicts with file from package obs-build-20190321-314.1.1.fc30.noarch
  file /usr/lib/build/configs/sl15.5.conf from install of
build-20190709-318.2.noarch conflicts with file from package
obs-build-20190321-314.1.1.fc30.noarch
  file /usr/lib/build/debtransform from install of build-20190709-318.2.noarch
conflicts with file from package obs-build-20190321-314.1.1.fc30.noarch
  file /usr/lib/build/expanddeps from install of build-20190709-318.2.noarch
conflicts with file from package obs-build-20190321-314.1.1.fc30.noarch
  file /usr/lib/build/init_buildsystem from install of
build-20190709-318.2.noarch conflicts with file from package
obs-build-20190321-314.1.1.fc30.noarch
  file /usr/lib/build/openstack-console from install of
build-20190709-318.2.noarch conflicts with file from package
obs-build-20190321-314.1.1.fc30.noarch

Error Summary
-------------

because Fedora already packages "build" as obs-build.  It would be nice and
useful if your packaging "Obsoletes: obs-build < %{version}".