For some reason when we clone with refspec specified the remote added is origin1 instead of origin.

Checkout Command:

scmVars = checkout([$class: 'GitSCM',
branches: [[name: "$Branch"]],
doGenerateSubmoduleConfigurations: false,
extensions: [
[$class: 'GitLFSPull'],
[$class: 'CheckoutOption', timeout: 120],
[$class: 'CleanBeforeCheckout'],
[$class: 'CloneOption', noTags: false, timeout: 60],
[$class: 'LocalBranch', localBranch: '${BRANCH}']
],
gitTool: 'Default', submoduleCfg: [],
userRemoteConfigs: [
[refspec: '+refs/heads/main:refs/remotes/origin/main +refs/heads/dev/*:refs/remotes/origin/dev/* +refs/heads/release/*:refs/remotes/origin/release/* +refs/tags/*:refs/tags/*'],
[credentialsId: '***', url: '****']
]
])
checkout([$class: 'GitSCM',
branches: [[name: "$Branch2"]],
doGenerateSubmoduleConfigurations: false,
extensions: [
[$class: 'GitLFSPull'],
[$class: 'CheckoutOption', timeout: 120],
[$class: 'CleanBeforeCheckout'],
[$class: 'RelativeTargetDirectory', relativeTargetDir: '../branch2']
],
gitTool: 'Default', submoduleCfg: [],
userRemoteConfigs: [
[refspec: '+refs/heads/main:refs/remotes/origin/main +refs/heads/dev/*:refs/remotes/origin/dev/* +refs/heads/release/*:refs/remotes/origin/release/* +refs/tags/*:refs/tags/*'],
[credentialsId: '****', url: '****']
]
])

Build Log (with stuff redacted):

14:31:44 No credentials specified
14:31:44 using credential ****
14:31:44 Fetching changes from the remote Git repository
14:31:44 Cleaning workspace
14:31:44 > git rev-parse --is-inside-work-tree # timeout=10
14:31:44 > git config remote.origin1.url **** # timeout=10
14:31:44 > git rev-parse --verify HEAD # timeout=10
14:31:44 Resetting working tree
14:31:44 > git reset --hard # timeout=10
14:32:00 > git clean -fdx # timeout=10
14:32:59 Fetching upstream changes from ****
14:32:59 > git --version # timeout=10
14:32:59 using GIT_ASKPASS to set credentials for accessing git repo
14:32:59 > git fetch --tags --force --progress **** +refs/heads/:refs/remotes/origin1/ # timeout=60
14:33:11 Checking out Revision 4b7d7fe66b0f61cce5fb28aed2659928d3929ea8 (origin/dev/macmain)
14:33:11 Enabling Git LFS pull
14:33:11 > git rev-parse origin/dev/macmain^{commit} # timeout=10
14:33:11 > git rev-parse refs/remotes/origin1/origin/dev/macmain^{commit} # timeout=10
14:33:11 > git config core.sparsecheckout # timeout=10
14:33:11 > git checkout -f 4b7d7fe66b0f61cce5fb28aed2659928d3929ea8 # timeout=120
14:33:12 > git branch -a -v --no-abbrev # timeout=10
14:33:12 > git checkout -b origin/dev/macmain 4b7d7fe66b0f61cce5fb28aed2659928d3929ea8 # timeout=120
14:33:13 > git config --get remote.origin1.url # timeout=10
14:33:13 using GIT_ASKPASS to set credentials for accessing git repo
14:33:13 > git lfs pull origin1 # timeout=120
14:33:32 Commit message: "Some commit"
14:33:32 First time build. Skipping changelog.

Removing the refspec fixes the issue and origin is the name of the remote.

If you clone on the machine manually then let jenkins take over you will have 2 remotes the original origin from the clone and a new origin1. This can cause your build to use an older commit instead of the latest.