$ git clone -n https://src.fedoraproject.org/rpms/sisu-mojos.git /var/lib/mock/f40-build-1924472-25102/root/chroot_tmpdir/scmroot/sisu-mojos
Cloning into '/var/lib/mock/f40-build-1924472-25102/root/chroot_tmpdir/scmroot/sisu-mojos'...
$ git fetch origin b60bea69385a987c5d604c5e6768a745ed97edf9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sisu-mojos
 * [new ref]         b60bea69385a987c5d604c5e6768a745ed97edf9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b60bea6 Rebuilt for java-21-openjdk as system jdk