$ git clone -n https://src.fedoraproject.org/rpms/libpng.git /var/lib/mock/f31-build-100090-33222/root/chroot_tmpdir/scmroot/libpng
Cloning into '/var/lib/mock/f31-build-100090-33222/root/chroot_tmpdir/scmroot/libpng'...
$ git reset --hard 34cc9b13db1aa3972cb2f5c83e83ae6093c14cf0
HEAD is now at 34cc9b1 - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild