$ git clone -n https://src.fedoraproject.org/rpms/putty.git /var/lib/mock/f40-build-2058618-49149/root/chroot_tmpdir/scmroot/putty
Cloning into '/var/lib/mock/f40-build-2058618-49149/root/chroot_tmpdir/scmroot/putty'...
$ git fetch origin bc679a14f72902e1a6d80ddcd8465075e3598b8a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/putty
 * [new ref]         bc679a14f72902e1a6d80ddcd8465075e3598b8a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bc679a1 New version