$ git clone -n http://fedora.riscv.rocks:3000/rpms/java-21-openjdk-portable.git /var/lib/mock/f40-build-789635-135940/root/chroot_tmpdir/scmroot/java-21-openjdk-portable
Cloning into '/var/lib/mock/f40-build-789635-135940/root/chroot_tmpdir/scmroot/java-21-openjdk-portable'...
$ git fetch origin eae3b45028a7c4ba2ea242401a83e6171ba1e849:KOJI_FETCH_HEAD
From http://fedora.riscv.rocks:3000/rpms/java-21-openjdk-portable
 * [new ref]         eae3b45028a7c4ba2ea242401a83e6171ba1e849 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eae3b45 Bootstrap using JDK 20