$ git clone -n https://src.fedoraproject.org/rpms/haproxy.git /var/lib/mock/f40-build-2241203-53661/root/chroot_tmpdir/scmroot/haproxy
Cloning into '/var/lib/mock/f40-build-2241203-53661/root/chroot_tmpdir/scmroot/haproxy'...
$ git fetch origin 59edbb996bf0de053bda65b47142bda22a9ee9dd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/haproxy
 * [new ref]         59edbb996bf0de053bda65b47142bda22a9ee9dd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 59edbb9 Update to 2.8.3 (#2219397)