Downloading release files with wget fails

$ wget -S https://bitbucket.org/nikratio/s3ql/downloads/s3ql-2.17.1.tar.bz2

converted 'https://bitbucket.org/nikratio/s3ql/downloads/s3ql-2.17.1.tar.bz2' (ANSI_X3.4-1968) -> 'https://bitbucket.org/nikratio/s3ql/downloads/s3ql-2.17.1.tar.bz2' (UTF-8)
--2016-04-21 09:10:18--  https://bitbucket.org/nikratio/s3ql/downloads/s3ql-2.17.1.tar.bz2
Resolving bitbucket.org (bitbucket.org)... 104.192.143.3, 104.192.143.2, 104.192.143.1
Connecting to bitbucket.org (bitbucket.org)|104.192.143.3|:443... connected.
HTTP request sent, awaiting response...
  HTTP/1.1 302 FOUND
  Server: nginx/1.6.2
  Vary: Accept-Language, Cookie
  Cache-Control: max-age=0
  Content-Type: text/html; charset=utf-8
  Strict-Transport-Security: max-age=31536000
  Date: Thu, 21 Apr 2016 09:10:18 GMT
  Location: https://bbuseruploads.s3.amazonaws.com/53ce0fc8-5e4c-46cf-8fc5-ab074b0411ff/downloads/effb035f-71f4-4e72-99d8-481ca89fff23/s3ql-2.17.1.tar.bz2?Signature=RsKrwh%2BTKr5hi3Hitg%2B9D5E%2B7I4%3D&Expires=1461230913&AWSAccessKeyId=AKIAIWY5XSVPZPDQYRQQ&versionId=fCqVFpVHt1KsDnIDK62KmEV4g6aHPAeA&response-content-disposition=attachment%3B%20filename%3D%22s3ql-2.17.1.tar.bz2%22
  X-Served-By: app-104
  Expires: Thu, 21 Apr 2016 09:10:18 GMT
  Content-Language: en
  ETag: "d41d8cd98f00b204e9800998ecf8427e"
  X-Static-Version: f42899d589f9
  X-Content-Type-Options: nosniff
  X-Render-Time: 0.0302240848541
  Connection: keep-alive
  X-Request-Count: 106
  X-Frame-Options: SAMEORIGIN
  Last-Modified: Thu, 21 Apr 2016 09:10:18 GMT
  X-Version: f42899d589f9
  Content-Length: 0
Location: https://bbuseruploads.s3.amazonaws.com/53ce0fc8-5e4c-46cf-8fc5-ab074b0411ff/downloads/effb035f-71f4-4e72-99d8-481ca89fff23/s3ql-2.17.1.tar.bz2?Signature=RsKrwh%2BTKr5hi3Hitg%2B9D5E%2B7I4%3D&Expires=1461230913&AWSAccessKeyId=AKIAIWY5XSVPZPDQYRQQ&versionId=fCqVFpVHt1KsDnIDK62KmEV4g6aHPAeA&response-content-disposition=attachment%3B%20filename%3D%22s3ql-2.17.1.tar.bz2%22 [following]
converted 'https://bbuseruploads.s3.amazonaws.com/53ce0fc8-5e4c-46cf-8fc5-ab074b0411ff/downloads/effb035f-71f4-4e72-99d8-481ca89fff23/s3ql-2.17.1.tar.bz2?Signature=RsKrwh%2BTKr5hi3Hitg%2B9D5E%2B7I4%3D&Expires=1461230913&AWSAccessKeyId=AKIAIWY5XSVPZPDQYRQQ&versionId=fCqVFpVHt1KsDnIDK62KmEV4g6aHPAeA&response-content-disposition=attachment%3B%20filename%3D%22s3ql-2.17.1.tar.bz2%22' (ANSI_X3.4-1968) -> 'https://bbuseruploads.s3.amazonaws.com/53ce0fc8-5e4c-46cf-8fc5-ab074b0411ff/downloads/effb035f-71f4-4e72-99d8-481ca89fff23/s3ql-2.17.1.tar.bz2?Signature=RsKrwh+TKr5hi3Hitg+9D5E+7I4=&Expires=1461230913&AWSAccessKeyId=AKIAIWY5XSVPZPDQYRQQ&versionId=fCqVFpVHt1KsDnIDK62KmEV4g6aHPAeA&response-content-disposition=attachment; filename="s3ql-2.17.1.tar.bz2"' (UTF-8)
--2016-04-21 09:10:18--  https://bbuseruploads.s3.amazonaws.com/53ce0fc8-5e4c-46cf-8fc5-ab074b0411ff/downloads/effb035f-71f4-4e72-99d8-481ca89fff23/s3ql-2.17.1.tar.bz2?Signature=RsKrwh+TKr5hi3Hitg+9D5E+7I4=&Expires=1461230913&AWSAccessKeyId=AKIAIWY5XSVPZPDQYRQQ&versionId=fCqVFpVHt1KsDnIDK62KmEV4g6aHPAeA&response-content-disposition=attachment;%20filename=%22s3ql-2.17.1.tar.bz2%22
Resolving bbuseruploads.s3.amazonaws.com (bbuseruploads.s3.amazonaws.com)... 54.231.112.176
Connecting to bbuseruploads.s3.amazonaws.com (bbuseruploads.s3.amazonaws.com)|54.231.112.176|:443... connected.
HTTP request sent, awaiting response...
  HTTP/1.1 403 Forbidden
  x-amz-request-id: E28389B140D38CA7
  x-amz-id-2: 0X3AujMIvuRibI5NOLWoQ+k4tI2/hL+wGZTnVOon2GwhTWwZgFqLf2cRAeR0VVTZAJdamPIjryM=
  Content-Type: application/xml
  Transfer-Encoding: chunked
  Date: Thu, 21 Apr 2016 09:10:18 GMT
  Server: AmazonS3
2016-04-21 09:10:19 ERROR 403: Forbidden.