$ git clone -n https://src.fedoraproject.org/rpms/java-runtime-decompiler.git /var/lib/mock/f41-build-750645-13382/root/chroot_tmpdir/scmroot/java-runtime-decompiler
Cloning into '/var/lib/mock/f41-build-750645-13382/root/chroot_tmpdir/scmroot/java-runtime-decompiler'...
$ git fetch origin e2ade0a80c11dadccb7ae4b2e958576bc7357f95:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/java-runtime-decompiler
 * [new ref]         e2ade0a80c11dadccb7ae4b2e958576bc7357f95 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e2ade0a Use modern %patch