$ git clone -n https://src.fedoraproject.org/rpms/maven-doxia-sitetools.git /var/lib/mock/f39-build-1888180-42788/root/chroot_tmpdir/scmroot/maven-doxia-sitetools
Cloning into '/var/lib/mock/f39-build-1888180-42788/root/chroot_tmpdir/scmroot/maven-doxia-sitetools'...
$ git fetch origin db3a86ab2052c8aa27d57c0d7966ca72d65c12d7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/maven-doxia-sitetools
 * [new ref]         db3a86ab2052c8aa27d57c0d7966ca72d65c12d7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at db3a86a Remove velocity workaround, needed for F40+ only