Console Output

19:52:06 The recommended git tool is: git
19:52:09 using credential docker-jenkins-github-credentials
19:52:09 Cloning the remote Git repository
19:52:09 Cloning with configured refspecs honoured and without tags
Cloning repository https://github.com/docker/docker-py.git
 > git init /home/ubuntu/workspace/docker-py_PR-2878 # timeout=10
Fetching upstream changes from https://github.com/docker/docker-py.git
 > git --version # timeout=10
 > git --version # 'git version 2.25.1'
using GIT_ASKPASS to set credentials docker-jenkins GitHub credentials
 > git fetch --no-tags --force --progress -- https://github.com/docker/docker-py.git +refs/pull/2878/head:refs/remotes/origin/PR-2878 +refs/heads/master:refs/remotes/origin/master # timeout=10
19:52:11 Fetching without tags
19:52:12 Merging remotes/origin/master commit 1abeb46dfa1dbe89e384652ef81e57def0b2e285 into PR head commit 827b562593b10ffe60301112216c482fd45a02cb
 > git config remote.origin.url https://github.com/docker/docker-py.git # timeout=10
 > git config --add remote.origin.fetch +refs/pull/2878/head:refs/remotes/origin/PR-2878 # timeout=10
 > git config --add remote.origin.fetch +refs/heads/master:refs/remotes/origin/master # timeout=10
 > git config remote.origin.url https://github.com/docker/docker-py.git # timeout=10
Fetching upstream changes from https://github.com/docker/docker-py.git
using GIT_ASKPASS to set credentials docker-jenkins GitHub credentials
 > git fetch --no-tags --force --progress -- https://github.com/docker/docker-py.git +refs/pull/2878/head:refs/remotes/origin/PR-2878 +refs/heads/master:refs/remotes/origin/master # timeout=10
 > git config core.sparsecheckout # timeout=10
 > git checkout -f 827b562593b10ffe60301112216c482fd45a02cb # timeout=10
19:52:12 Merge succeeded, producing 827b562593b10ffe60301112216c482fd45a02cb
19:52:12 Checking out Revision 827b562593b10ffe60301112216c482fd45a02cb (PR-2878)
 > git remote # timeout=10
 > git config --get remote.origin.url # timeout=10
using GIT_ASKPASS to set credentials docker-jenkins GitHub credentials
 > git merge 1abeb46dfa1dbe89e384652ef81e57def0b2e285 # timeout=10
 > git rev-parse HEAD^{commit} # timeout=10
 > git config core.sparsecheckout # timeout=10
 > git checkout -f 827b562593b10ffe60301112216c482fd45a02cb # timeout=10
19:52:16 Commit message: "Improve containers documentation"
 > git --version # timeout=10
 > git --version # 'git version 2.25.1'
fatal: bad object 5d8b74fd03a1c7cc00e1c1f32d100ed97a17f4f0