$ git clone -n https://src.fedoraproject.org/rpms/java-1.8.0-openjdk.git /var/lib/mock/f41-build-side-1-2834453-33684/root/chroot_tmpdir/scmroot/java-1.8.0-openjdk
Cloning into '/var/lib/mock/f41-build-side-1-2834453-33684/root/chroot_tmpdir/scmroot/java-1.8.0-openjdk'...
$ git fetch origin 7d45b0414fc596796f7859c5a94cdca9a99242d6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/java-1.8.0-openjdk
 * [new ref]         7d45b0414fc596796f7859c5a94cdca9a99242d6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7d45b04 July CPU