$ git clone -n https://src.fedoraproject.org/rpms/python-ftfy.git /var/lib/mock/f39-build-2138478-50838/root/chroot_tmpdir/scmroot/python-ftfy
Cloning into '/var/lib/mock/f39-build-2138478-50838/root/chroot_tmpdir/scmroot/python-ftfy'...
$ git fetch origin f6f0a3c9088e8dedb075569f041282342050a1a4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-ftfy
 * [new ref]         f6f0a3c9088e8dedb075569f041282342050a1a4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f6f0a3c Initial import