$ git clone -n https://src.fedoraproject.org/rpms/pam.git /var/lib/mock/f42-build-side-1-3583136-46887/root/chroot_tmpdir/scmroot/pam
Cloning into '/var/lib/mock/f42-build-side-1-3583136-46887/root/chroot_tmpdir/scmroot/pam'...
$ git fetch origin 65521f27a609fe78b44ab0627e7391fc2d04db39:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pam
 * [new ref]         65521f27a609fe78b44ab0627e7391fc2d04db39 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 65521f2 pam_namespace: fix potential privilege escalation.