Build vTPM rpm packages. Based on Debian-based one by @vbatts : https://gist.github.com/vbatts/184a570663d3a24881741007be0784cb

build-vtpm-libvirt-fedora.sh

#!/bin/bash

set -eux

# FROM fedora 34

sudo dnf install -y automake autoconf curl expect gcc git glib2-devel gnutls-devel \
  gnutls-utils json-glib-devel gmp-devel gnutls-devel libseccomp-devel \
  libtasn1-devel libtool libtpms-devel net-tools openssl-devel \
  rpm-build python3-twisted selinux-policy-devel socat softhsm tpm2-pkcs11 \
  tpm2-pkcs11-tools tpm2-tools tpm2-abrmd trousers vim wget

EMAIL="${EMAIL:[email protected]}"
NAME="${NAME:-Dongsu Park}"

git config --global user.email "${EMAIL}"
git config --global user.name "${NAME}"

OUTPUT=${OUTPUT:-/tmp}
libtpms_ver="0.8.2"
swtpm_ver="0.5.2"
swtpm_url="${SWTPM_URL:-https://github.com/stefanberger/swtpm}"

wget -O ${HOME}/rpmbuild/SOURCES/libtpms-${libtpms_ver}.tar.gz \
    https://github.com/stefanberger/libtpms/archive/v${libtpms_ver}.tar.gz

# build libtpms
[ -d libtpms ] || git clone https://github.com/stefanberger/libtpms.git
cd libtpms
git checkout v${libtpms_ver}

rpmbuild -ba ./dist/libtpms.spec

cd ..

# build swtpm
wget -O ${HOME}/rpmbuild/SOURCES/swtpm-${swtpm_ver}.tar.gz \
    ${swtpm_url}/archive/v${swtpm_ver}.tar.gz
    
[ -d swtpm ] || git clone ${swtpm_url}
cd swtpm
git checkout v${swtpm_ver}

# need to replace "enter_commit_here" with an actual version number
sed -i -e "s/enter_commit_here/${swtpm_ver}/" ./dist/swtpm.spec

rpmbuild -ba ./dist/swtpm.spec

cd ..

cp ${HOME}/rpmbuild/RPMS/x86_64/{libtpms,swtpm}*.rpm "${OUTPUT}"/

# vim:set sts=2 sw=2 et:

Right, I updated the gist again.
It is about replacing "enter_commit_here" with an actual version, like:

sed -i -e "s/enter_commit_here/0.5.2/" ./dist/swtpm.spec