$ git clone -n https://src.fedoraproject.org/rpms/kitinerary.git /var/lib/mock/f42-build-863435-171701/root/chroot_tmpdir/scmroot/kitinerary
Cloning into '/var/lib/mock/f42-build-863435-171701/root/chroot_tmpdir/scmroot/kitinerary'...
$ git fetch origin 6d57b89c781f30a728c5abf99fda5c3ebec3d359:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kitinerary
 * [new ref]         6d57b89c781f30a728c5abf99fda5c3ebec3d359 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6d57b89 Rebuild for new libphonenumber