$ git clone -n https://src.fedoraproject.org/rpms/ecdsautils.git /var/lib/mock/f40-build-2209226-52150/root/chroot_tmpdir/scmroot/ecdsautils
Cloning into '/var/lib/mock/f40-build-2209226-52150/root/chroot_tmpdir/scmroot/ecdsautils'...
$ git fetch origin c9ec1db129f677d95df4adf06cec0d69b369210a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ecdsautils
 * [new ref]         c9ec1db129f677d95df4adf06cec0d69b369210a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c9ec1db update specfile