$ git clone -n https://src.fedoraproject.org/rpms/java-1.8.0-openjdk-portable.git /var/lib/mock/f40-build-754072-117573/root/chroot_tmpdir/scmroot/java-1.8.0-openjdk-portable
Cloning into '/var/lib/mock/f40-build-754072-117573/root/chroot_tmpdir/scmroot/java-1.8.0-openjdk-portable'...
$ git fetch origin f913d2138495c85edb302c897647260aca4d4d1b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/java-1.8.0-openjdk-portable
 * [new ref]         f913d2138495c85edb302c897647260aca4d4d1b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f913d21 updated to CPU 07/23 jdk8u382-b05