$ git clone -n https://src.fedoraproject.org/rpms/libpng10.git /var/lib/mock/f31-build-59275-28556/root/chroot_tmpdir/scmroot/libpng10
Cloning into '/var/lib/mock/f31-build-59275-28556/root/chroot_tmpdir/scmroot/libpng10'...
$ git reset --hard a2bc28c4f526a972b9503beb2014cecdb1202ed4
HEAD is now at a2bc28c - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild