$ git clone -n https://src.fedoraproject.org/rpms/java-latest-openjdk-portable.git /var/lib/mock/f42-build-side-1-3582066-46843/root/chroot_tmpdir/scmroot/java-latest-openjdk-portable
Cloning into '/var/lib/mock/f42-build-side-1-3582066-46843/root/chroot_tmpdir/scmroot/java-latest-openjdk-portable'...
$ git fetch origin dafff6d4c19e3bb93f3ea78e6b37b3152b97ae2a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/java-latest-openjdk-portable
 * [new ref]         dafff6d4c19e3bb93f3ea78e6b37b3152b97ae2a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dafff6d Bumped release