The `--sha256` param isn't working

[mattalxndr]

Command:

eget --sha256 github.com/pantsbuild/scie-pants

Output:

https://github.com/pantsbuild/scie-pants/releases/download/v0.12.3/scie-pants-linux-x86_64
Downloading 100% [=============================================================================================================================] (7.1/7.1 MB, 10.568 MB/s)
Checksum verified with scie-pants-linux-x86_64.sha256
Extracted `scie-pants-linux-x86_64` to `scie-pants`