Console Output

10:45:27 The recommended git tool is: git
10:45:27 using credential docker-jenkins-github-credentials
10:45:27 Cloning the remote Git repository
10:45:27 Cloning with configured refspecs honoured and without tags
10:45:28 Fetching without tags
10:45:28 Merging remotes/origin/master commit 55f405e04a91ddbbc26aa738bd3cb41bd28f8dbd into PR head commit be49c28bae072486b0d87eeb3e923db1d12f826e
10:45:28 Merge succeeded, producing be49c28bae072486b0d87eeb3e923db1d12f826e
10:45:28 Checking out Revision be49c28bae072486b0d87eeb3e923db1d12f826e (PR-2784)
10:45:28 Commit message: "relax PORT_SPEC regex so it accept and ignore square brackets"
Cloning repository https://github.com/docker/docker-py.git
 > git init /home/ubuntu/workspace/docker-py_PR-2784 # 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/2784/head:refs/remotes/origin/PR-2784 +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/2784/head:refs/remotes/origin/PR-2784 # 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/2784/head:refs/remotes/origin/PR-2784 +refs/heads/master:refs/remotes/origin/master # timeout=10
 > git config core.sparsecheckout # timeout=10
 > git checkout -f be49c28bae072486b0d87eeb3e923db1d12f826e # 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 55f405e04a91ddbbc26aa738bd3cb41bd28f8dbd # timeout=10
 > git rev-parse HEAD^{commit} # timeout=10
 > git config core.sparsecheckout # timeout=10
 > git checkout -f be49c28bae072486b0d87eeb3e923db1d12f826e # timeout=10
 > git --version # timeout=10
 > git --version # 'git version 2.25.1'
fatal: bad object 5d8b74fd03a1c7cc00e1c1f32d100ed97a17f4f0