$ git clone -n https://src.fedoraproject.org/rpms/trackballs.git /var/lib/mock/f41-build-833808-158003/root/chroot_tmpdir/scmroot/trackballs
Cloning into '/var/lib/mock/f41-build-833808-158003/root/chroot_tmpdir/scmroot/trackballs'...
$ git fetch origin e2fa7ca721a93eeca43a2cc45b66e667d7d8ec85:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/trackballs
 * [new ref]         e2fa7ca721a93eeca43a2cc45b66e667d7d8ec85 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e2fa7ca 1.3.4, built against guile3