$ git clone -n https://src.fedoraproject.org/rpms/libpq.git /var/lib/mock/f31-build-69918-30382/root/thebuilddir/tmp/scmroot/libpq
Cloning into '/var/lib/mock/f31-build-69918-30382/root/thebuilddir/tmp/scmroot/libpq'...
$ git reset --hard 2cc12a508a797100d97aaa372c6792ccc58786a2
HEAD is now at 2cc12a5 - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild