Console Output

13:40:43 The recommended git tool is: git
13:40:43 using credential docker-jenkins-github-credentials
13:40:43 Cloning the remote Git repository
13:40:43 Cloning with configured refspecs honoured and without tags
13:40:43 Fetching without tags
13:40:44 Merging remotes/origin/master commit 0892fcfc12c6c83a10fd23e08c39464784f50632 into PR head commit ac9ae1f249c7635b3fd12b12d293f1c9848aaef5
13:40:44 Merge succeeded, producing ac9ae1f249c7635b3fd12b12d293f1c9848aaef5
13:40:44 Checking out Revision ac9ae1f249c7635b3fd12b12d293f1c9848aaef5 (PR-2801)
13:40:44 Commit message: "Fix containers low-level documentation examples"
Cloning repository https://github.com/docker/docker-py.git
 > git init /home/ubuntu/workspace/docker-py_PR-2801 # 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/2801/head:refs/remotes/origin/PR-2801 +refs/heads/master:refs/remotes/origin/master # timeout=10
 > git config remote.origin.url https://github.com/docker/docker-py.git # timeout=10
 > git config --add remote.origin.fetch +refs/pull/2801/head:refs/remotes/origin/PR-2801 # 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/2801/head:refs/remotes/origin/PR-2801 +refs/heads/master:refs/remotes/origin/master # timeout=10
 > git config core.sparsecheckout # timeout=10
 > git checkout -f ac9ae1f249c7635b3fd12b12d293f1c9848aaef5 # timeout=10
 > git remote # timeout=10
 > git config --get remote.origin.url # timeout=10
using GIT_ASKPASS to set credentials docker-jenkins GitHub credentials
 > git merge 0892fcfc12c6c83a10fd23e08c39464784f50632 # timeout=10
 > git rev-parse HEAD^{commit} # timeout=10
 > git config core.sparsecheckout # timeout=10
 > git checkout -f ac9ae1f249c7635b3fd12b12d293f1c9848aaef5 # timeout=10
 > git --version # timeout=10
 > git --version # 'git version 2.25.1'
fatal: bad object 5d8b74fd03a1c7cc00e1c1f32d100ed97a17f4f0