$ git clone -n https://src.fedoraproject.org/rpms/java-latest-openjdk.git /var/lib/mock/f41-build-side-1-3132671-39663/root/chroot_tmpdir/scmroot/java-latest-openjdk
Cloning into '/var/lib/mock/f41-build-side-1-3132671-39663/root/chroot_tmpdir/scmroot/java-latest-openjdk'...
$ git fetch origin 673e1ade92bb938f95f47448d2f9c69d232aa3b5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/java-latest-openjdk
 * [new ref]         673e1ade92bb938f95f47448d2f9c69d232aa3b5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 673e1ad October CPU repack