Console Output

14:02:58 The recommended git tool is: git
14:02:58 using credential docker-jenkins-github-credentials
14:02:58 Cloning the remote Git repository
14:02:58 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-2804 # 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/2804/head:refs/remotes/origin/PR-2804 +refs/heads/master:refs/remotes/origin/master # timeout=10
14:03:00 Fetching without tags
14:03:00 Merging remotes/origin/master commit 18fdc23b7cca98408f88beec3426c27070e9393f into PR head commit 8945fda6be44f99cdbd68e5912eca4dffbb13acc
14:03:00 Merge succeeded, producing cc9883797338a8ef57f6ca7e554b7d79d51833b4
14:03:00 Checking out Revision cc9883797338a8ef57f6ca7e554b7d79d51833b4 (PR-2804)
14:03:00 Commit message: "Merge commit '18fdc23b7cca98408f88beec3426c27070e9393f' into HEAD"
14:03:00 First time build. Skipping changelog.
 > git config remote.origin.url https://github.com/docker/docker-py.git # timeout=10
 > git config --add remote.origin.fetch +refs/pull/2804/head:refs/remotes/origin/PR-2804 # 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/2804/head:refs/remotes/origin/PR-2804 +refs/heads/master:refs/remotes/origin/master # timeout=10
 > git config core.sparsecheckout # timeout=10
 > git checkout -f 8945fda6be44f99cdbd68e5912eca4dffbb13acc # 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 18fdc23b7cca98408f88beec3426c27070e9393f # timeout=10
 > git rev-parse HEAD^{commit} # timeout=10
 > git config core.sparsecheckout # timeout=10
 > git checkout -f cc9883797338a8ef57f6ca7e554b7d79d51833b4 # timeout=10
 > git --version # timeout=10
 > git --version # 'git version 2.25.1'
fatal: bad object 5d8b74fd03a1c7cc00e1c1f32d100ed97a17f4f0