$ git clone -n https://src.fedoraproject.org/rpms/pdftk-java.git /var/lib/mock/f40-build-2674488-67713/root/chroot_tmpdir/scmroot/pdftk-java
Cloning into '/var/lib/mock/f40-build-2674488-67713/root/chroot_tmpdir/scmroot/pdftk-java'...
$ git fetch origin c563cb64543dcfa5b4eadade079dcbf1455b52bd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pdftk-java
 * [new ref]         c563cb64543dcfa5b4eadade079dcbf1455b52bd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c563cb6 Rebuilt for java-21-openjdk as system jdk