$ git clone -n https://src.fedoraproject.org/rpms/pam.git /var/lib/mock/f41-build-side-1-2650354-27586/root/chroot_tmpdir/scmroot/pam
Cloning into '/var/lib/mock/f41-build-side-1-2650354-27586/root/chroot_tmpdir/scmroot/pam'...
$ git fetch origin e7883c91be2de55ac4c9546e9362e746cd528389:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pam
 * [new ref]         e7883c91be2de55ac4c9546e9362e746cd528389 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e7883c9 Disable NIS on RHEL