$ git clone -n https://src.fedoraproject.org/rpms/PyGreSQL.git /var/lib/mock/f40-build-734620-105986/root/chroot_tmpdir/scmroot/PyGreSQL
Cloning into '/var/lib/mock/f40-build-734620-105986/root/chroot_tmpdir/scmroot/PyGreSQL'...
$ git fetch origin 4b0c49623cfb84f83d7411b14d1ead000fb9607d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/PyGreSQL
 * [new ref]         4b0c49623cfb84f83d7411b14d1ead000fb9607d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4b0c496 Rebase to the pre-release upstream version (rhbz#2237758)