$ git clone -n https://src.fedoraproject.org/rpms/libpqxx.git /var/lib/mock/f31-build-59282-28556/root/chroot_tmpdir/scmroot/libpqxx
Cloning into '/var/lib/mock/f31-build-59282-28556/root/chroot_tmpdir/scmroot/libpqxx'...
$ git reset --hard 9a1a6b746ac9e54b24ef5eeb284f811de2bc17ec
HEAD is now at 9a1a6b7 - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild