$ git clone -n https://src.fedoraproject.org/rpms/brltty.git /var/lib/mock/f40-build-780021-130658/root/chroot_tmpdir/scmroot/brltty
Cloning into '/var/lib/mock/f40-build-780021-130658/root/chroot_tmpdir/scmroot/brltty'...
$ git fetch origin b9e9ca558451635bd1eb4242b504358c17587f1a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/brltty
 * [new ref]         b9e9ca558451635bd1eb4242b504358c17587f1a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b9e9ca5 Rebuild for ICU 74