$ git clone -n https://github.com/xcp-ng-rpms/swtpm.git /var/lib/mock/v8.3-incoming-10156-28716/root/chroot_tmpdir/scmroot/swtpm
Cloning into '/var/lib/mock/v8.3-incoming-10156-28716/root/chroot_tmpdir/scmroot/swtpm'...
$ git fetch origin 07575aac17068c6b1df24ca679f4718e1c83bab4:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/swtpm
 * [new ref]         07575aac17068c6b1df24ca679f4718e1c83bab4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 07575aa Rebuild on openssl-3