$ git clone -n https://src.fedoraproject.org/rpms/modello.git /var/lib/mock/f40-build-2536187-61850/root/chroot_tmpdir/scmroot/modello
Cloning into '/var/lib/mock/f40-build-2536187-61850/root/chroot_tmpdir/scmroot/modello'...
$ git fetch origin b3429387db5fd38bc95ee6ac19592d9ca5878eb7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/modello
 * [new ref]         b3429387db5fd38bc95ee6ac19592d9ca5878eb7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b342938 Rebuilt for java-21-openjdk as system jdk