$ git clone -n https://src.fedoraproject.org/rpms/java-1.8.0-openjdk.git /var/lib/mock/f41-build-side-1-2800181-32800/root/chroot_tmpdir/scmroot/java-1.8.0-openjdk
Cloning into '/var/lib/mock/f41-build-side-1-2800181-32800/root/chroot_tmpdir/scmroot/java-1.8.0-openjdk'...
$ git fetch origin 79c3a38e58ddf776b372f3adcaaa12002919fe0b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/java-1.8.0-openjdk
 * [new ref]         79c3a38e58ddf776b372f3adcaaa12002919fe0b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 79c3a38 convert license to SPDX