$ git clone -n https://src.fedoraproject.org/rpms/java-jd-decompiler.git /var/lib/mock/f41-build-750635-13382/root/chroot_tmpdir/scmroot/java-jd-decompiler
Cloning into '/var/lib/mock/f41-build-750635-13382/root/chroot_tmpdir/scmroot/java-jd-decompiler'...
$ git fetch origin 884b1e2fd7876067fe2c3d606006029dc6a4f619:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/java-jd-decompiler
 * [new ref]         884b1e2fd7876067fe2c3d606006029dc6a4f619 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 884b1e2 Add Requires on javapackages-tools