$ git clone -n https://src.fedoraproject.org/rpms/brltty.git /var/lib/mock/f41-build-side-1-2632579-25820/root/chroot_tmpdir/scmroot/brltty
Cloning into '/var/lib/mock/f41-build-side-1-2632579-25820/root/chroot_tmpdir/scmroot/brltty'...
$ git fetch origin d38d4c43521ffdf921f3696e6ce10a2cac048543:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/brltty
 * [new ref]         d38d4c43521ffdf921f3696e6ce10a2cac048543 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d38d4c4 Use bcond consistently