$ git clone -n https://src.fedoraproject.org/rpms/maven-reporting-impl.git /var/lib/mock/f40-build-2676383-67857/root/chroot_tmpdir/scmroot/maven-reporting-impl
Cloning into '/var/lib/mock/f40-build-2676383-67857/root/chroot_tmpdir/scmroot/maven-reporting-impl'...
$ git fetch origin 7ed438d4ebb5ef0244ec7fdc249b7f1df9307ebb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/maven-reporting-impl
 * [new ref]         7ed438d4ebb5ef0244ec7fdc249b7f1df9307ebb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7ed438d Build for JDK 8 at a minimum (rhbz#2266674)