$ git clone -n https://src.fedoraproject.org/rpms/haproxy.git /var/lib/mock/f45-build-13322-449/root/chroot_tmpdir/scmroot/haproxy
Cloning into '/var/lib/mock/f45-build-13322-449/root/chroot_tmpdir/scmroot/haproxy'...
$ git fetch origin 11852b3685f34562a7302bfa46baa4df66c29967:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/haproxy
 * [new ref]         11852b3685f34562a7302bfa46baa4df66c29967 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 11852b3 Upgrade to 3.4.3