$ git clone -n https://src.fedoraproject.org/rpms/sisu.git /var/lib/mock/f40-build-2497858-61664/root/chroot_tmpdir/scmroot/sisu
Cloning into '/var/lib/mock/f40-build-2497858-61664/root/chroot_tmpdir/scmroot/sisu'...
$ git fetch origin f6676e1155582225138ca45a97067f82e5ba463c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sisu
 * [new ref]         f6676e1155582225138ca45a97067f82e5ba463c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f6676e1 Rebuilt for java-21-openjdk as system jdk