$ git clone -n https://src.fedoraproject.org/rpms/libpng.git /var/lib/mock/f31-build-59274-28556/root/chroot_tmpdir/scmroot/libpng
Cloning into '/var/lib/mock/f31-build-59274-28556/root/chroot_tmpdir/scmroot/libpng'...
$ git reset --hard 6065e2005436c245511ebcb5f4be7baa05ac2019
HEAD is now at 6065e20 New upstream release 1.6.37