$ git clone -n https://src.fedoraproject.org/rpms/wlroots.git /var/lib/mock/f39-build-2169978-51007/root/chroot_tmpdir/scmroot/wlroots
Cloning into '/var/lib/mock/f39-build-2169978-51007/root/chroot_tmpdir/scmroot/wlroots'...
$ git fetch origin 99aa7067f08a3faa3bf05d729efc06f9a20a601e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/wlroots
 * [new ref]         99aa7067f08a3faa3bf05d729efc06f9a20a601e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 99aa706 Update to 0.17.1 (#2255547)