having SocketException: connection reset issues the moment we migrated from AWS CodeCommit to GitHub Enterprise

[2023-03-29 10:34:13,353]   WARN [l executor 1733] -      jetbrains.buildServer.VCS - Failed to run operation within 1 attempt: org.eclipse.jgit.errors.TransportException: git@github.com:Holocene-Advisors-LP/hadev.portal.git: Session.connect: java.net.SocketException: Connection reset (enable debug to see stacktrace)
[2023-03-29 10:34:13,353]   WARN [l executor 1733] -      jetbrains.buildServer.VCS - Unable to collect changes for [Portal & RMS Builds / portal / DR Portal {id=Portal_DrPortal/bt25}]: jetbrains.buildServer.vcs.VcsRootVcsException: Error collecting changes for VCS repository '"https://git-codecommit.us-east-1.amazonaws.com/v1/repos/hadev.portal" {instance id=159, parent internal id=23, parent id=Portal_HttpsGitCodecommitUsEast1amazonawsComV1reposHadevPortal, description: "git@github.com:Holocene-Advisors-LP/hadev.portal.git#refs/heads/master"}'
org.eclipse.jgit.errors.TransportException: git@github.com:Holocene-Advisors-LP/hadev.portal.git: Session.connect: java.net.SocketException: Connection reset: jetbrains.buildServer.vcs.VcsRootVcsException: Error collecting changes for VCS repository '"https://git-codecommit.us-east-1.amazonaws.com/v1/repos/hadev.portal" {instance id=159, parent internal id=23, parent id=Portal_HttpsGitCodecommitUsEast1amazonawsComV1reposHadevPortal, description: "git@github.com:Holocene-Advisors-LP/hadev.portal.git#refs/heads/master"}'
org.eclipse.jgit.errors.TransportException: git@github.com:Holocene-Advisors-LP/hadev.portal.git: Session.connect: java.net.SocketException: Connection reset (enable debug to see stacktrace)
[2023-03-29 10:34:13,369]   WARN [l executor 1737] -      jetbrains.buildServer.VCS - Failed to run operation within 1 attempt: org.eclipse.jgit.errors.TransportException: git@github.com:Holocene-Advisors-LP/hadev.portal.api.git: Session.connect: java.net.SocketException: Connection reset (enable debug to see stacktrace)
[2023-03-29 10:34:13,369]   WARN [l executor 1737] -      jetbrains.buildServer.VCS - Unable to collect changes for [Portal & RMS Builds / portal.api / DR Build {id=PortalApi_DrBuild/bt26}]: jetbrains.buildServer.vcs.VcsRootVcsException: Error collecting changes for VCS repository '"https://git-codecommit.us-east-1.amazonaws.com/v1/repos/hadev.portal.api" {instance id=162, parent internal id=22, parent id=PortalApi_HttpsGitCodecommitUsEast1amazonawsComV1reposHadevPortalApi, description: "git@github.com:Holocene-Advisors-LP/hadev.portal.api.git#refs/heads/master"}'
org.eclipse.jgit.errors.TransportException: git@github.com:Holocene-Advisors-LP/hadev.portal.api.git: Session.connect: java.net.SocketException: Connection reset: jetbrains.buildServer.vcs.VcsRootVcsException: Error collecting changes for VCS repository '"https://git-codecommit.us-east-1.amazonaws.com/v1/repos/hadev.portal.api" {instance id=162, parent internal id=22, parent id=PortalApi_HttpsGitCodecommitUsEast1amazonawsComV1reposHadevPortalApi, description: "git@github.com:Holocene-Advisors-LP/hadev.portal.api.git#refs/heads/master"}'
org.eclipse.jgit.errors.TransportException: git@github.com:Holocene-Advisors-LP/hadev.portal.api.git: Session.connect: java.net.SocketException: Connection reset (enable debug to see stacktrace)
[2023-03-29 10:34:13,369]   WARN [l executor 1735] -      jetbrains.buildServer.VCS - Failed to run operation within 1 attempt: org.eclipse.jgit.errors.TransportException: git@github.com:Holocene-Advisors-LP/haqr.pylibs.RMS: Session.connect: java.net.SocketException: Connection reset (enable debug to see stacktrace)
[2023-03-29 10:34:13,369]   WARN [l executor 1722] -      jetbrains.buildServer.VCS - Failed to run operation within 1 attempt: org.eclipse.jgit.errors.TransportException: git@github.com:Holocene-Advisors-LP/hadev.portal.libs.git: Session.connect: java.net.SocketException: Connection reset (enable debug to see stacktrace)
[2023-03-29 10:34:13,369]   WARN [l executor 1723] -      jetbrains.buildServer.VCS - Failed to run operation within 1 attempt: org.eclipse.jgit.errors.TransportException: git@github.com:Holocene-Advisors-LP/haqr.pylibs.HoloDB: Session.connect: java.net.SocketException: Connection reset (enable debug to see stacktrace)

Hi! The error "java.net.SocketException: Connection reset" indicates a networking issue. I'd recommend making sure that running this command locally on the TeamCity server works consistently:

git ls-remote <fetch_URL_of _the_problematic_VCS_root>

Another thing you can try is to switch TeamCity server-side Git operations from JGit to Native git:
https://www.jetbrains.com/help/teamcity/git.html#Native+Git+for+VCS-related+operations+on+the+server
That option is only available for TeamCity versions 2022.04 and above.