$ git clone -n https://src.fedoraproject.org/rpms/jacktrip.git /var/lib/mock/f40-build-795613-140206/root/chroot_tmpdir/scmroot/jacktrip
Cloning into '/var/lib/mock/f40-build-795613-140206/root/chroot_tmpdir/scmroot/jacktrip'...
$ git fetch origin 767837eb50e7b5f83abd53e612e34331797a4362:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jacktrip
 * [new ref]         767837eb50e7b5f83abd53e612e34331797a4362 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 767837e Update to 2.2.2