$ git clone -n https://src.fedoraproject.org/rpms/brltty.git /var/lib/mock/f42-build-868810-176267/root/chroot_tmpdir/scmroot/brltty
Cloning into '/var/lib/mock/f42-build-868810-176267/root/chroot_tmpdir/scmroot/brltty'...
$ git fetch origin 2fa6404ec10d8480f92954d41facf81eff6c6236:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/brltty
 * [new ref]         2fa6404ec10d8480f92954d41facf81eff6c6236 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2fa6404 Fixed compilation and work with tcl8 compat package