$ git clone -n https://src.fedoraproject.org/rpms/java-1.8.0-openjdk.git /var/lib/mock/f41-build-1468897-23748/root/chroot_tmpdir/scmroot/java-1.8.0-openjdk
Cloning into '/var/lib/mock/f41-build-1468897-23748/root/chroot_tmpdir/scmroot/java-1.8.0-openjdk'...
$ git fetch origin 2f11e957d31e5bf5544fcb57ddc0ec6d8ecf6c22:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/java-1.8.0-openjdk
 * [new ref]         2f11e957d31e5bf5544fcb57ddc0ec6d8ecf6c22 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2f11e95 repacking april CPU portables