$ git clone -n https://src.fedoraproject.org/rpms/maven-reporting-api.git /var/lib/mock/f41-build-1189072-22177/root/chroot_tmpdir/scmroot/maven-reporting-api
Cloning into '/var/lib/mock/f41-build-1189072-22177/root/chroot_tmpdir/scmroot/maven-reporting-api'...
$ git fetch origin f6483a75493baf02dc95255d3eaf8feb7e4a8f59:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/maven-reporting-api
 * [new ref]         f6483a75493baf02dc95255d3eaf8feb7e4a8f59 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f6483a7 Build for JDK 8 at a minimum (rhbz#2266673)