$ git clone -n https://src.fedoraproject.org/rpms/maven-enforcer.git /var/lib/mock/f40-build-2377080-60422/root/chroot_tmpdir/scmroot/maven-enforcer
Cloning into '/var/lib/mock/f40-build-2377080-60422/root/chroot_tmpdir/scmroot/maven-enforcer'...
$ git fetch origin 78f7910a654cf57b48845c186d45311d07878c65:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/maven-enforcer
 * [new ref]         78f7910a654cf57b48845c186d45311d07878c65 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 78f7910 Update to upstream version 3.4.1