diff --git a/.gitignore b/.gitignore
index e69de29..da32694 100644
--- a/.gitignore
+++ b/.gitignore
@@ -0,0 +1,5 @@
+/dotnet-build-reference-packages-9cc7dad.tar.gz
+/dotnet-build-reference-packages-6e2aee6.tar.gz
+/dotnet-build-reference-packages-5aaf20d.tar.gz
+/dotnet-build-reference-packages-1b1a695.tar.gz
+/dotnet-build-reference-packages-cd5a8c6.tar.gz
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..b5400c1
--- /dev/null
+++ b/README.md
@@ -0,0 +1,9 @@
+# dotnet-build-reference-packages
+
+The dotnet-build-reference-packages package contains reference assemblies needed to build .NET Core.
+
+This package is not meant to be used by end-users.
+
+For developers, you can easily update this package using:
+
+    ./update-release <new-upstream-git-sha>
diff --git a/dotnet-build-reference-packages.spec b/dotnet-build-reference-packages.spec
new file mode 100644
index 0000000..be9d171
--- /dev/null
+++ b/dotnet-build-reference-packages.spec
@@ -0,0 +1,86 @@
+%global debug_package %{nil}
+
+%global commit cd5a8c6f5c67cbaa87755aafa8765e812ceaa2dc
+%global shortcommit %(c=%{commit}; echo ${c:0:7})
+
+Name:           dotnet-build-reference-packages
+Version:        0
+Release:        7.20200608git%{shortcommit}%{?dist}
+Summary:        Reference packages needed by the .NET Core SDK build
+
+License:        MIT
+URL:            https://github.com/dotnet/source-build-reference-packages
+Source0:        https://github.com/dotnet/source-build-reference-packages/archive/%{commit}/%{name}-%{shortcommit}.tar.gz
+
+%if 0%{?fedora} > 32 || 0%{?rhel} > 8
+ExclusiveArch:  aarch64 x86_64
+%else
+ExclusiveArch:  x86_64
+%endif
+
+BuildRequires:  dotnet-sdk-3.1
+BuildRequires:  dotnet-sdk-3.1-source-built-artifacts
+
+%description
+This contains references packages used for building .NET Core.
+
+This is not meant to be used by end-users.
+
+
+%prep
+%setup -q -n source-build-reference-packages-%{commit}
+
+find -name '*.nupkg' -type f -delete
+find -name '*.dll' -type f -delete
+find -name '*.so' -type f -delete
+find -name '*.tar.gz' -type f -delete
+
+%build
+find -iname 'nuget.config' -exec echo {} \; -exec cat {} \;
+
+%{_libdir}/dotnet/dotnet --info
+
+./build.sh \
+  --with-sdk %{_libdir}/dotnet \
+  --with-packages %{_libdir}/dotnet/source-built-artifacts/*.tar.gz
+
+pushd artifacts/reference-packages
+tar cvzf Private.SourceBuild.ReferencePackages.%{version}.tar.gz *.nupkg
+popd
+mv artifacts/reference-packages/Private.SourceBuild.ReferencePackages.%{version}.tar.gz .
+
+%install
+mkdir -p %{buildroot}/%{_libdir}/dotnet
+cp -a artifacts/reference-packages %{buildroot}/%{_libdir}/dotnet/
+cp -a Private.SourceBuild.ReferencePackages.%{version}.tar.gz %{buildroot}/%{_libdir}/dotnet/reference-packages/
+
+
+%files
+%dir %{_libdir}/dotnet/
+%{_libdir}/dotnet/reference-packages/
+%license LICENSE.txt
+
+
+%changelog
+* Mon Jul 27 2020 Fedora Release Engineering <releng@fedoraproject.org> - 0-7.20200608gitcd5a8c6
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_33_Mass_Rebuild
+
+* Tue Jul 21 2020 Omair Majid <omajid@redhat.com> - 0-6.20200608gitcd5a8c6
+- Update to upstream commit cd5a8c6
+
+* Mon Jul 20 2020 Omair Majid <omajid@redhat.com> - 0-5.20200608git1b1a695
+- Update to upstream commit 1b1a695
+
+* Fri Jun 19 2020 Omair Majid <omajid@redhat.com> - 0-4.20200608git5aaf20d
+- Enable building on aarch64
+
+* Mon Jun 08 2020 Chris Rummel <crummel@microsoft.com> - 0-3.20200608git5aaf20d
+- Updated to upstream commit 5aaf20d
+
+* Tue Jun 02 2020 Omair Majid <omajid@redhat.com> - 0-3.20200528git6e2aee66e2aee6
+- Updated to upstream commit 6e2aee6
+
+* Wed Feb 19 2020 Radka Janekova <rjanekov@redhat.com> - 0-2.20200108git9cc7dad
+- Added license reference
+* Tue Feb 11 2020 Omair Majid <omajid@redhat.com> - 0-1.20200108git9cc7dad
+- Initial package
diff --git a/sources b/sources
new file mode 100644
index 0000000..5573443
--- /dev/null
+++ b/sources
@@ -0,0 +1 @@
+SHA512 (dotnet-build-reference-packages-cd5a8c6.tar.gz) = 416967b6cb1c0cedaa664d8d065ff1ae63bc5cb5be6296a97228f0277914c32d806d2b00508e67d0d778a57e7e661ed7eca8badd31a1214f87d734dc0f9e4a44
diff --git a/update-release b/update-release
new file mode 100755
index 0000000..d6d3fe4
--- /dev/null
+++ b/update-release
@@ -0,0 +1,48 @@
+#!/bin/bash
+
+# Usage:
+#     ./update-release commit-sha
+
+set -euo pipefail
+IFS=$'\n\t'
+
+print_usage() {
+    echo " Usage:"
+    echo "     ./update-release commit-sha"
+    echo ""
+    echo "Update the source-build-reference-packages package to the upstream commit sha"
+}
+
+positional_args=()
+while [[ "$#" -gt 0 ]]; do
+    arg="${1}"
+    case "${arg}" in
+        -h|--help)
+            print_usage
+            exit 0
+            ;;
+        *)
+            positional_args+=("$1")
+            shift
+            ;;
+    esac
+done
+
+spec_file=dotnet-build-reference-packages.spec
+
+commit_sha=${positional_args[0]:-}
+if [[ -z ${commit_sha} ]]; then
+    echo "error: missing commit sha"
+    exit 1
+fi
+
+set -x
+
+sed -i -E "s|^%global commit [a-f0-9]+$|%global commit ${commit_sha}|" "$spec_file"
+sed -i -E "s|^(Release: +[[:digit:]]+\.)([[:digit:]]{8})git|\1$(date '+%4Y%m%d')git|" "$spec_file"
+
+spectool -g "${spec_file}"
+
+comment="Update to upstream commit ${commit_sha:0:7}"
+
+rpmdev-bumpspec --comment="$comment" $spec_file