$ git clone -n https://src.fedoraproject.org/rpms/clamsmtp.git /var/lib/mock/f41-build-1046777-19100/root/chroot_tmpdir/scmroot/clamsmtp
Cloning into '/var/lib/mock/f41-build-1046777-19100/root/chroot_tmpdir/scmroot/clamsmtp'...
$ git fetch origin f512c8b2c809ecbfafbad04791f38b78e32dc057:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/clamsmtp
 * [new ref]         f512c8b2c809ecbfafbad04791f38b78e32dc057 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f512c8b Removed deprecated patch macro usage