scripts/update-status-go: support commit SHA1
scripts/update-status-go: support commit SHA1

In some rare cases we might want to supply an exact commit rather than a
branch name or a git tag.

Signed-off-by: Jakub Sokołowski <1d3764b91b902f6b45836e2498da81fe35caf6d6@status.im>

status-im/status-react,status-im/status-react,status-im/status-react,status-im/status-react,status-im/status-react,status-im/status-react,status-im/status-react,status-im/status-react