podman/docs/source/markdown/options/ssh.md

####> This option file is used in: ####> podman build, farm build ####> If file is edited, make sure the changes ####> are applicable to all of those.

--ssh=default | id[=socket>

SSH agent socket or keys to expose to the build. The socket path can be left empty to use the value of default=$SSH_AUTH_SOCK

To later use the ssh agent, use the --mount option in a RUN instruction within a Containerfile:

RUN --mount=type=ssh,id=id mycmd