$ git clone -n https://src.fedoraproject.org/rpms/webkit2gtk4.0.git /var/lib/mock/f40-build-780184-130701/root/chroot_tmpdir/scmroot/webkit2gtk4.0
Cloning into '/var/lib/mock/f40-build-780184-130701/root/chroot_tmpdir/scmroot/webkit2gtk4.0'...
$ git reset --hard dafff112f9d69ee9488f0a7ecf241a983cca17fd
HEAD is now at dafff11 Update to WebKitGTK 2.42.5