$ git clone -n https://src.fedoraproject.org/rpms/R-png.git /var/lib/mock/f31-build-99196-33130/root/chroot_tmpdir/scmroot/R-png
Cloning into '/var/lib/mock/f31-build-99196-33130/root/chroot_tmpdir/scmroot/R-png'...
$ git reset --hard 4602801d2e3777a17e8258b3839ae7fecf3c8a76
HEAD is now at 4602801 - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild