$ git clone -n https://src.fedoraproject.org/rpms/phoc.git /var/lib/mock/f42-build-3350621-45010/root/chroot_tmpdir/scmroot/phoc
Cloning into '/var/lib/mock/f42-build-3350621-45010/root/chroot_tmpdir/scmroot/phoc'...
$ git fetch origin 6e445830272945b3de08bbebe2ff23a350bbdd96:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/phoc
 * [new ref]         6e445830272945b3de08bbebe2ff23a350bbdd96 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6e44583 Remove macro from comment