$ git clone -n https://src.fedoraproject.org/rpms/directory-maven-plugin.git /var/lib/mock/f40-build-2483856-61639/root/chroot_tmpdir/scmroot/directory-maven-plugin
Cloning into '/var/lib/mock/f40-build-2483856-61639/root/chroot_tmpdir/scmroot/directory-maven-plugin'...
$ git fetch origin 8eba38b413f3bc4edbe244bcfcb36ddfaf7ca7fd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/directory-maven-plugin
 * [new ref]         8eba38b413f3bc4edbe244bcfcb36ddfaf7ca7fd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8eba38b bump java source/target to 1.8, fixes 2266639