$ git clone -n https://src.fedoraproject.org/rpms/maven-doxia-sitetools.git /var/lib/mock/f40-build-2350145-60165/root/chroot_tmpdir/scmroot/maven-doxia-sitetools
Cloning into '/var/lib/mock/f40-build-2350145-60165/root/chroot_tmpdir/scmroot/maven-doxia-sitetools'...
$ git fetch origin 618efb2af9a2653aa3a8eb2a4ee602f9c7005c73:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/maven-doxia-sitetools
 * [new ref]         618efb2af9a2653aa3a8eb2a4ee602f9c7005c73 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 618efb2 Adapt to plexus-velocity 2.0