[komat@localhost firefox]$ KRB5_TRACE=/dev/stdout fedpkg build
[6159] 1583311258.625474: ccselect module realm chose cache KCM:1000 with client principal stransky@FEDORAPROJECT.ORG for server principal HTTP/proxy01.fedoraproject.org@FEDORAPROJECT.ORG
[6159] 1583311258.625475: Getting credentials stransky@FEDORAPROJECT.ORG -> HTTP/proxy01.fedoraproject.org@FEDORAPROJECT.ORG using ccache KCM:1000
[6159] 1583311258.625476: Retrieving stransky@FEDORAPROJECT.ORG -> HTTP/proxy01.fedoraproject.org@FEDORAPROJECT.ORG from KCM:1000 with result: -1765328243/Matching credential not found
[6159] 1583311258.625477: Retrieving stransky@FEDORAPROJECT.ORG -> krbtgt/FEDORAPROJECT.ORG@FEDORAPROJECT.ORG from KCM:1000 with result: 0/Success
[6159] 1583311258.625478: Starting with TGT for client realm: stransky@FEDORAPROJECT.ORG -> krbtgt/FEDORAPROJECT.ORG@FEDORAPROJECT.ORG
[6159] 1583311258.625479: Requesting tickets for HTTP/proxy01.fedoraproject.org@FEDORAPROJECT.ORG, referrals on
[6159] 1583311258.625480: Generated subkey for TGS request: aes256-cts/9C67
[6159] 1583311258.625481: etypes requested in TGS request: aes256-cts, aes256-sha2, camellia256-cts, aes128-cts, aes128-sha2, camellia128-cts
[6159] 1583311258.625483: Encoding request body and padata into FAST request
[6159] 1583311258.625484: Sending request (977 bytes) to FEDORAPROJECT.ORG
[6159] 1583311258.625485: Resolving hostname id.fedoraproject.org
[6159] 1583311259.53412: TLS certificate name matched "id.fedoraproject.org"
[6159] 1583311259.53413: Sending HTTPS request to https 209.132.190.2:443
[6159] 1583311259.53414: Received answer (935 bytes) from https 209.132.190.2:443
[6159] 1583311259.53415: Terminating TCP connection to https 209.132.190.2:443
[6159] 1583311259.53416: Sending DNS URI query for _kerberos.FEDORAPROJECT.ORG.
[6159] 1583311259.53417: URI answer: 10 1 "krb5srv:m:kkdcp:https://id.fedoraproject.org/KdcProxy/"
[6159] 1583311259.53418: Response was from master KDC
[6159] 1583311259.53419: Decoding FAST response
[6159] 1583311259.53420: FAST reply key: aes256-cts/4837
[6159] 1583311259.53421: TGS reply is for stransky@FEDORAPROJECT.ORG -> HTTP/proxy01.fedoraproject.org@FEDORAPROJECT.ORG with session key aes256-cts/679C
[6159] 1583311259.53422: TGS request result: 0/Success
[6159] 1583311259.53423: Received creds for desired service HTTP/proxy01.fedoraproject.org@FEDORAPROJECT.ORG
[6159] 1583311259.53424: Storing stransky@FEDORAPROJECT.ORG -> HTTP/proxy01.fedoraproject.org@FEDORAPROJECT.ORG in KCM:1000
[6159] 1583311259.53426: Creating authenticator for stransky@FEDORAPROJECT.ORG -> HTTP/proxy01.fedoraproject.org@FEDORAPROJECT.ORG, seqnum 113036421, subkey aes256-cts/B6E2, session key aes256-cts/679C
Kerberos authentication fails: unable to obtain a session
Could not execute build: Could not login to https://koji.fedoraproject.org/kojihub