$ git clone -n https://src.fedoraproject.org/rpms/java-runtime-decompiler.git /var/lib/mock/f40-build-1904645-25073/root/chroot_tmpdir/scmroot/java-runtime-decompiler
Cloning into '/var/lib/mock/f40-build-1904645-25073/root/chroot_tmpdir/scmroot/java-runtime-decompiler'...
$ git fetch origin 4d37fe9411daa74039309fbe99f4f8704236bdc1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/java-runtime-decompiler
 * [new ref]         4d37fe9411daa74039309fbe99f4f8704236bdc1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4d37fe9 Rebuilt for java-21-openjdk as system jdk